diff --git a/docs/USER-DOCUMENTATION.md b/docs/USER-DOCUMENTATION.md
index cb361c85..0fa329ed 100644
--- a/docs/USER-DOCUMENTATION.md
+++ b/docs/USER-DOCUMENTATION.md
@@ -166,7 +166,7 @@ Run the following command in `Terminal.app`, replacing `N` by the corresponding
 disk number, which you can find by running `diskutil list`:
 
 ```sh
-diskutil eraseDisk free UNTITLED /dev/diskN
+diskutil eraseDisk FAT32 UNTITLED MBRFormat /dev/diskN
 ```
 
 ### GNU/Linux
diff --git a/lib/gui/app/components/drive-selector/DriveSelectorModal.tsx b/lib/gui/app/components/drive-selector/DriveSelectorModal.tsx
index 97aaad52..c93f3f68 100644
--- a/lib/gui/app/components/drive-selector/DriveSelectorModal.tsx
+++ b/lib/gui/app/components/drive-selector/DriveSelectorModal.tsx
@@ -173,7 +173,7 @@ export function DriveSelectorModal({ close }: { close: () => void }) {
 							<li
 								key={`item-${drive.displayName}`}
 								className="list-group-item"
-								// @ts-ignore (FIXME: not	a valid <li> attribute but used by css rule)
+								// @ts-ignore (FIXME: not a valid <li> attribute but used by css rule)
 								disabled={!isDriveValid(drive, selectionState.getImage())}
 								onDoubleClick={() => selectDriveAndClose(drive)}
 								onClick={() => toggleDrive(drive)}
@@ -243,7 +243,7 @@ export function DriveSelectorModal({ close }: { close: () => void }) {
 								{isDriveValid(drive, selectionState.getImage()) && (
 									<span
 										className="list-group-item-section tick tick--success"
-										// @ts-ignore (FIXME: not	a valid <span> attribute but used by css rule)
+										// @ts-ignore (FIXME: not a valid <span> attribute but used by css rule)
 										disabled={!selectionState.isDriveSelected(drive.device)}
 									></span>
 								)}
diff --git a/lib/gui/app/components/finish/finish.tsx b/lib/gui/app/components/finish/finish.tsx
index 5e19c7ce..dc1cb194 100644
--- a/lib/gui/app/components/finish/finish.tsx
+++ b/lib/gui/app/components/finish/finish.tsx
@@ -18,7 +18,6 @@ import * as _ from 'lodash';
 import * as React from 'react';
 import * as uuidV4 from 'uuid/v4';
 
-import * as messages from '../../../../shared/messages';
 import * as flashState from '../../models/flash-state';
 import * as selectionState from '../../models/selection-state';
 import { store } from '../../models/store';
@@ -67,18 +66,12 @@ const formattedErrors = () => {
 };
 
 function FinishPage({ goToMain }: { goToMain: () => void }) {
-	// @ts-ignore
 	const results = flashState.getFlashResults().results || {};
-	const progressMessage = messages.progress;
 	return (
 		<div className="page-finish row around-xs">
 			<div className="col-xs">
 				<div className="box center">
-					<FlashResults
-						results={results}
-						message={progressMessage}
-						errors={formattedErrors}
-					></FlashResults>
+					<FlashResults results={results} errors={formattedErrors()} />
 
 					<FlashAnother
 						onClick={(options: any) => restart(options, goToMain)}
diff --git a/lib/gui/app/components/flash-results/flash-results.tsx b/lib/gui/app/components/flash-results/flash-results.tsx
index 90b27e20..a3d9f925 100644
--- a/lib/gui/app/components/flash-results/flash-results.tsx
+++ b/lib/gui/app/components/flash-results/flash-results.tsx
@@ -16,36 +16,48 @@
 
 import * as _ from 'lodash';
 import * as React from 'react';
+import { Txt } from 'rendition';
 import styled from 'styled-components';
 import { left, position, space, top } from 'styled-system';
+
+import { progress } from '../../../../shared/messages';
+import { bytesToMegabytes } from '../../../../shared/units';
 import { Underline } from '../../styled-components';
 
-const Div: any = styled.div<any>`
+const Div = styled.div<any>`
   ${position}
   ${top}
   ${left}
   ${space}
 `;
 
-export const FlashResults: any = ({
+export function FlashResults({
 	errors,
 	results,
-	message,
 }: {
-	errors: () => string;
-	results: any;
-	message: any;
-}) => {
+	errors: string;
+	results: {
+		averageFlashingSpeed: number;
+		devices: { failed: number; successful: number };
+	};
+}) {
+	const averageSpeed = _.round(
+		bytesToMegabytes(results.averageFlashingSpeed),
+		1,
+	);
 	return (
 		<Div position="absolute" left="153px" top="66px">
 			<div className="inline-flex title">
 				<span className="tick tick--success space-right-medium"></span>
 				<h3>Flash Complete!</h3>
 			</div>
-			<Div className="results" mt="11px" mr="0" mb="0" ml="40px">
-				<Underline tooltip={errors()}>
-					{_.map(results.devices, (quantity, type) => {
-						return quantity ? (
+			<Div className="results" mr="0" mb="0" ml="40px">
+				{_.map(results.devices, (quantity, type) => {
+					return quantity ? (
+						<Underline
+							tooltip={type === 'failed' ? errors : undefined}
+							key={type}
+						>
 							<div
 								key={type}
 								className={`target-status-line target-status-${type}`}
@@ -53,13 +65,23 @@ export const FlashResults: any = ({
 								<span className="target-status-dot"></span>
 								<span className="target-status-quantity">{quantity}</span>
 								<span className="target-status-message">
-									{message[type](quantity)}
+									{progress[type](quantity)}
 								</span>
 							</div>
-						) : null;
-					})}
-				</Underline>
+						</Underline>
+					) : null;
+				})}
+				<Txt
+					color="#787c7f"
+					fontSize="10px"
+					style={{
+						fontWeight: 500,
+						textAlign: 'center',
+					}}
+				>
+					Writing speed: {averageSpeed} MB/s
+				</Txt>
 			</Div>
 		</Div>
 	);
-};
+}
diff --git a/lib/gui/app/components/image-selector/image-selector.tsx b/lib/gui/app/components/image-selector/image-selector.tsx
index a95795e2..6f30e98a 100644
--- a/lib/gui/app/components/image-selector/image-selector.tsx
+++ b/lib/gui/app/components/image-selector/image-selector.tsx
@@ -220,10 +220,9 @@ export class ImageSelector extends React.Component<
 			return;
 		}
 
-		const source = new sdk.sourceDestination.File(
-			imagePath,
-			sdk.sourceDestination.File.OpenFlags.Read,
-		);
+		const source = new sdk.sourceDestination.File({
+			path: imagePath,
+		});
 		try {
 			const innerSource = await source.getInnerSource();
 			const metadata = (await innerSource.getMetadata()) as sdk.sourceDestination.Metadata & {
diff --git a/lib/gui/app/components/settings/settings.tsx b/lib/gui/app/components/settings/settings.tsx
index 066a07ca..3ff61072 100644
--- a/lib/gui/app/components/settings/settings.tsx
+++ b/lib/gui/app/components/settings/settings.tsx
@@ -137,7 +137,6 @@ export const SettingsModal: any = styled(
 				setting,
 				value,
 				dangerous,
-				// @ts-ignore
 				applicationSessionUuid: store.getState().toJS().applicationSessionUuid,
 			});
 
diff --git a/lib/gui/app/models/flash-state.ts b/lib/gui/app/models/flash-state.ts
index 524eaaab..4c2c1d56 100644
--- a/lib/gui/app/models/flash-state.ts
+++ b/lib/gui/app/models/flash-state.ts
@@ -87,7 +87,6 @@ export function setProgressState(
 
 			return null;
 		}),
-
 		totalSpeed: _.attempt(() => {
 			if (_.isFinite(state.totalSpeed)) {
 				return _.round(bytesToMegabytes(state.totalSpeed), PRECISION);
diff --git a/lib/gui/app/models/store.ts b/lib/gui/app/models/store.ts
index e05552da..412e5ba8 100644
--- a/lib/gui/app/models/store.ts
+++ b/lib/gui/app/models/store.ts
@@ -71,8 +71,10 @@ const DEFAULT_STATE = Immutable.fromJS({
 		failed: 0,
 		percentage: 0,
 		speed: null,
+		averageSpeed: null,
 		totalSpeed: null,
 	},
+	lastAverageFlashingSpeed: null,
 });
 
 /**
@@ -263,7 +265,11 @@ function storeReducer(
 				});
 			}
 
-			return state.set('flashState', Immutable.fromJS(action.data));
+			let ret = state.set('flashState', Immutable.fromJS(action.data));
+			if (action.data.flashing) {
+				ret = ret.set('lastAverageFlashingSpeed', action.data.averageSpeed);
+			}
+			return ret;
 		}
 
 		case Actions.RESET_FLASH_STATE: {
@@ -326,9 +332,19 @@ function storeReducer(
 				});
 			}
 
+			if (action.data.results) {
+				action.data.results.averageFlashingSpeed = state.get(
+					'lastAverageFlashingSpeed',
+				);
+			}
+
 			return state
 				.set('isFlashing', false)
 				.set('flashResults', Immutable.fromJS(action.data))
+				.set(
+					'lastAverageFlashingSpeed',
+					DEFAULT_STATE.get('lastAverageFlashingSpeed'),
+				)
 				.set('flashState', DEFAULT_STATE.get('flashState'));
 		}
 
diff --git a/lib/gui/app/modules/drive-scanner.ts b/lib/gui/app/modules/drive-scanner.ts
index e7b5946d..5d236e19 100644
--- a/lib/gui/app/modules/drive-scanner.ts
+++ b/lib/gui/app/modules/drive-scanner.ts
@@ -27,7 +27,7 @@ function includeSystemDrives() {
 }
 
 const adapters: sdk.scanner.adapters.Adapter[] = [
-	new sdk.scanner.adapters.BlockDeviceAdapter(includeSystemDrives),
+	new sdk.scanner.adapters.BlockDeviceAdapter({ includeSystemDrives }),
 ];
 
 // Can't use permissions.isElevated() here as it returns a promise and we need to set
diff --git a/lib/gui/app/modules/image-writer.ts b/lib/gui/app/modules/image-writer.ts
index 81d79661..e0f5a9c2 100644
--- a/lib/gui/app/modules/image-writer.ts
+++ b/lib/gui/app/modules/image-writer.ts
@@ -185,7 +185,6 @@ export function performWrite(
 			cancelled = true;
 		});
 
-		// @ts-ignore
 		ipc.server.on('state', onProgress);
 
 		ipc.server.on('ready', (_data, socket) => {
diff --git a/lib/gui/app/pages/main/MainPage.tsx b/lib/gui/app/pages/main/MainPage.tsx
index cd6b9a77..2be480c5 100644
--- a/lib/gui/app/pages/main/MainPage.tsx
+++ b/lib/gui/app/pages/main/MainPage.tsx
@@ -46,7 +46,6 @@ function getDrivesTitle() {
 	const drives = selectionState.getSelectedDrives();
 
 	if (drives.length === 1) {
-		// @ts-ignore
 		return drives[0].description || 'Untitled Device';
 	}
 
diff --git a/lib/gui/app/pages/main/styles/_main.scss b/lib/gui/app/pages/main/styles/_main.scss
index 3da1468b..66570361 100644
--- a/lib/gui/app/pages/main/styles/_main.scss
+++ b/lib/gui/app/pages/main/styles/_main.scss
@@ -165,7 +165,6 @@ img[disabled] {
 .target-status-line {
   display: flex;
   align-items: baseline;
-  margin-bottom: 9px;
 
   > .target-status-dot {
     width: 12px;
diff --git a/lib/gui/css/main.css b/lib/gui/css/main.css
index f59bef03..542c5c30 100644
--- a/lib/gui/css/main.css
+++ b/lib/gui/css/main.css
@@ -6347,8 +6347,7 @@ img[disabled] {
 
 .target-status-line {
   display: flex;
-  align-items: baseline;
-  margin-bottom: 9px; }
+  align-items: baseline; }
   .target-status-line > .target-status-dot {
     width: 12px;
     height: 12px;
diff --git a/lib/gui/modules/child-writer.ts b/lib/gui/modules/child-writer.ts
index d479a89d..dd4d90d3 100644
--- a/lib/gui/modules/child-writer.ts
+++ b/lib/gui/modules/child-writer.ts
@@ -97,24 +97,22 @@ async function writeAndValidate(
 ): Promise<WriteResult> {
 	let innerSource: sdk.sourceDestination.SourceDestination = await source.getInnerSource();
 	if (trim && (await innerSource.canRead())) {
-		// @ts-ignore FIXME: ts thinks that SparseReadStream can't be assigned to SparseReadable (which it implements)
-		innerSource = new sdk.sourceDestination.ConfiguredSource(
-			innerSource,
-			trim,
-			// Create stream from file-disk (not source stream)
-			true,
-		);
+		innerSource = new sdk.sourceDestination.ConfiguredSource({
+			source: innerSource,
+			shouldTrimPartitions: trim,
+			createStreamFromDisk: true,
+		});
 	}
 	const {
 		failures,
 		bytesWritten,
 	} = await sdk.multiWrite.pipeSourceToDestinations(
 		innerSource,
-		// @ts-ignore FIXME: ts thinks that BlockWriteStream can't be assigned to WritableStream (which it implements)
 		destinations,
 		onFail,
 		onProgress,
 		verify,
+		32,
 	);
 	const result: WriteResult = {
 		bytesWritten,
@@ -125,8 +123,9 @@ async function writeAndValidate(
 		errors: [],
 	};
 	for (const [destination, error] of failures) {
-		(error as Error & { device: string }).device = destination.drive.device;
-		result.errors.push(error);
+		const err = error as Error & { device: string };
+		err.device = (destination as sdk.sourceDestination.BlockDevice).device;
+		result.errors.push(err);
 	}
 	return result;
 }
@@ -218,18 +217,18 @@ ipc.connectTo(IPC_SERVER_ID, () => {
 		log(`Validate on success: ${options.validateWriteOnSuccess}`);
 		log(`Trim: ${options.trim}`);
 		const dests = _.map(options.destinations, destination => {
-			return new sdk.sourceDestination.BlockDevice(
-				destination,
-				options.unmountOnSuccess,
-			);
+			return new sdk.sourceDestination.BlockDevice({
+				drive: destination,
+				unmountOnSuccess: options.unmountOnSuccess,
+				write: true,
+				direct: true,
+			});
+		});
+		const source = new sdk.sourceDestination.File({
+			path: options.imagePath,
 		});
-		const source = new sdk.sourceDestination.File(
-			options.imagePath,
-			sdk.sourceDestination.File.OpenFlags.Read,
-		);
 		try {
 			const results = await writeAndValidate(
-				// @ts-ignore FIXME: ts thinks that SparseWriteStream can't be assigned to SparseWritable (which it implements)
 				source,
 				dests,
 				options.validateWriteOnSuccess,
diff --git a/lib/shared/messages.ts b/lib/shared/messages.ts
index 32ca61e6..c0537226 100644
--- a/lib/shared/messages.ts
+++ b/lib/shared/messages.ts
@@ -14,7 +14,9 @@
  * limitations under the License.
  */
 
-export const progress = {
+import { Dictionary } from 'lodash';
+
+export const progress: Dictionary<(quantity: number) => string> = {
 	successful: (quantity: number) => {
 		const plural = quantity === 1 ? '' : 's';
 		return `Successful device${plural}`;
diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 86426f46..a9465d01 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -343,6 +343,19 @@
         "fastq": "^1.6.0"
       }
     },
+    "@ronomon/direct-io": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/@ronomon/direct-io/-/direct-io-3.0.1.tgz",
+      "integrity": "sha512-NkKB32bjq7RfMdAMiWayphMlVWzsfPiKelK+btXLqggv1vDVgv2xELqeo0z4uYLLt86fVReLPxQj7qpg0zWvow==",
+      "requires": {
+        "@ronomon/queue": "^3.0.1"
+      }
+    },
+    "@ronomon/queue": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/@ronomon/queue/-/queue-3.0.1.tgz",
+      "integrity": "sha512-STcqSvk+c7ArMrZgYxhM92p6O6F7t0SUbGr+zm8s9fJple5EdJAMwP3dXqgdXeF95xWhBpha5kjEqNAIdI0r4w=="
+    },
     "@samverschueren/stream-to-observable": {
       "version": "0.3.0",
       "resolved": "https://registry.npmjs.org/@samverschueren/stream-to-observable/-/stream-to-observable-0.3.0.tgz",
@@ -416,9 +429,9 @@
       "dev": true
     },
     "@types/bluebird": {
-      "version": "3.5.29",
-      "resolved": "https://registry.npmjs.org/@types/bluebird/-/bluebird-3.5.29.tgz",
-      "integrity": "sha512-kmVtnxTuUuhCET669irqQmPAez4KFnFVKvpleVRyfC3g+SHD1hIkFZcWLim9BVcwUBLO59o8VZE4yGCmTif8Yw==",
+      "version": "3.5.30",
+      "resolved": "https://registry.npmjs.org/@types/bluebird/-/bluebird-3.5.30.tgz",
+      "integrity": "sha512-8LhzvcjIoqoi1TghEkRMkbbmM+jhHnBokPGkJWjclMK+Ks0MxEBow3/p2/iFTZ+OIbJHQDSfpgdZEb+af3gfVw==",
       "dev": true
     },
     "@types/caseless": {
@@ -1840,17 +1853,28 @@
       }
     },
     "bl": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/bl/-/bl-3.0.0.tgz",
-      "integrity": "sha512-EUAyP5UHU5hxF8BPT0LKW8gjYLhq1DQIcneOX/pL/m2Alo+OYDQAJlHq+yseMP50Os2nHXOSic6Ss3vSQeyf4A==",
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/bl/-/bl-4.0.2.tgz",
+      "integrity": "sha512-j4OH8f6Qg2bGuWfRiltT2HYGx0e1QcBTrK9KAHNMwMZdQnDZFk0ZSYIpADjYCB3U12nicC5tVJwSIhwOWjb4RQ==",
       "requires": {
-        "readable-stream": "^3.0.1"
+        "buffer": "^5.5.0",
+        "inherits": "^2.0.4",
+        "readable-stream": "^3.4.0"
       },
       "dependencies": {
+        "buffer": {
+          "version": "5.5.0",
+          "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.5.0.tgz",
+          "integrity": "sha512-9FTEDjLjwoAkEwyMGDjYJQN2gfRgOKBKRfiglhvibGbpeeU/pQn1bJxQqm32OD/AIeEuHxU9roxXxg34Byp/Ww==",
+          "requires": {
+            "base64-js": "^1.0.2",
+            "ieee754": "^1.1.4"
+          }
+        },
         "readable-stream": {
-          "version": "3.5.0",
-          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.5.0.tgz",
-          "integrity": "sha512-gSz026xs2LfxBPudDuI41V1lka8cxg64E66SGe78zJlsUofOg/yqwezdIcdfwik6B4h8LFmWPA9ef9X3FiNFLA==",
+          "version": "3.6.0",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.0.tgz",
+          "integrity": "sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==",
           "requires": {
             "inherits": "^2.0.3",
             "string_decoder": "^1.1.1",
@@ -1869,9 +1893,9 @@
       }
     },
     "blockmap": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/blockmap/-/blockmap-4.0.0.tgz",
-      "integrity": "sha512-ykHgcaMZ3cPFEWku4Xz7+s7AsdfUE1x6dR7ZmaKIipu77eyq+XnBCI06Ez0VWpQfmLV/9Bsl9Qw+7cvNCNFWJA==",
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/blockmap/-/blockmap-4.0.1.tgz",
+      "integrity": "sha512-ktam+finx4xUQQNbKRBD6VXiULFCb814/N50QBWyD2e6nrWc3QvuMISDLKnSnK64pTnQUMA9dRWpyGFK9ZIchw==",
       "requires": {
         "debug": "^3.1.0",
         "xml-js": "^1.6.11"
@@ -1883,9 +1907,9 @@
       "integrity": "sha1-E/kwNaTtPG0pUwgkkkWg7XZ7NeI="
     },
     "bluebird": {
-      "version": "3.7.1",
-      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.7.1.tgz",
-      "integrity": "sha512-DdmyoGCleJnkbp3nkbxTLJ18rjDsE4yCggEwKNXkeV123sPNfOCYeDoeuOY+F2FrSjO1YXcTU+dsy96KMy+gcg=="
+      "version": "3.7.2",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.7.2.tgz",
+      "integrity": "sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg=="
     },
     "bluebird-lst": {
       "version": "1.0.9",
@@ -5402,13 +5426,13 @@
       "integrity": "sha512-kVscqXk4OCp68SZ0dkgEKVi6/8ij300KBWTJq32P/dYeWTSwK41WyTxalN1eRmA5Z9UU/LX9D7FWSmV9SAYx6g=="
     },
     "etcher-sdk": {
-      "version": "2.0.17",
-      "resolved": "https://registry.npmjs.org/etcher-sdk/-/etcher-sdk-2.0.17.tgz",
-      "integrity": "sha512-9RgYlugEFLFo+nMuXeBNPT9ODg89CmEsjjJW597MKx4WNIZWoCQXQJR1qw2uu3ZT5JuqPq82xz1/9PaiW2mSng==",
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/etcher-sdk/-/etcher-sdk-3.0.1.tgz",
+      "integrity": "sha512-Jd30W0OfKNwbQZ4NdsNLCItyPYNP3hIugJrG/V5uzBtpL4R+gldMrUopkJ1L0x59d9NwWavQ/CqM6gxrv3tVlw==",
       "requires": {
-        "@types/node": "^6.0.112",
+        "@ronomon/direct-io": "^3.0.1",
         "axios": "^0.18.0",
-        "blockmap": "^4.0.0",
+        "blockmap": "^4.0.1",
         "bluebird": "^3.5.1",
         "crc": "^3.8.0",
         "debug": "^3.1.0",
@@ -5416,26 +5440,19 @@
         "file-disk": "^6.0.1",
         "file-type": "^8.0.0",
         "lodash": "^4.17.10",
-        "lzma-native": "^4.0.5",
+        "lzma-native": "^6.0.0",
         "mountutils": "^1.3.18",
         "node-raspberrypi-usbboot": "^0.2.4",
         "outdent": "^0.7.0",
         "partitioninfo": "^5.3.4",
-        "readable-stream": "^2.3.6",
         "resin-image-fs": "^5.0.8",
+        "rwmutex": "^1.0.0",
         "speedometer": "^1.0.0",
-        "udif": "^0.15.7",
+        "udif": "^0.17.0",
         "unbzip2-stream": "github:balena-io-modules/unbzip2-stream#942fc218013c14adab01cf693b0500cf6ac83193",
         "unzip-stream": "^0.3.0",
         "xxhash": "^0.3.0",
         "yauzl": "^2.9.2"
-      },
-      "dependencies": {
-        "@types/node": {
-          "version": "6.14.9",
-          "resolved": "https://registry.npmjs.org/@types/node/-/node-6.14.9.tgz",
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-        }
       }
     },
     "event-emitter": {
@@ -8375,14 +8392,14 @@
       }
     },
     "lzma-native": {
-      "version": "4.0.6",
-      "resolved": "https://registry.npmjs.org/lzma-native/-/lzma-native-4.0.6.tgz",
-      "integrity": "sha512-1kiSs/KAcAuh9vyyd00ATXZFfrg6W8UCBqH1RKlWg/tBP5aQez6HYOY+SihmsZfpy0RVDioW5SLI76dZ3Mq5Rw==",
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/lzma-native/-/lzma-native-6.0.0.tgz",
+      "integrity": "sha512-rf5f4opPymsPHotgY2d0cUP3kbVxERSxWDGEbi2gnbnxuWGokFrBaQ02Oe9pssIwsgp0r0PnbSNg7VPY3AYe7w==",
       "requires": {
-        "nan": "^2.14.0",
+        "node-addon-api": "^1.6.0",
         "node-pre-gyp": "^0.11.0",
         "readable-stream": "^2.3.5",
-        "rimraf": "^2.6.1"
+        "rimraf": "^2.7.1"
       }
     },
     "make-dir": {
@@ -8698,9 +8715,9 @@
       "integrity": "sha512-jf84uxzwiuiIVKiOLpfYk7N46TSy8ubTonmneY9vrpHNAnp0QBt2BxWV9dO3/j+BoVAb+a5G6YDPW3M5HOdMWQ=="
     },
     "mimic-response": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/mimic-response/-/mimic-response-2.0.0.tgz",
-      "integrity": "sha512-8ilDoEapqA4uQ3TwS0jakGONKXVJqpy+RpM+3b7pLdOjghCrEiGp9SRkFbUHAmZW9vdnrENWHjaweIoTIJExSQ=="
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/mimic-response/-/mimic-response-2.1.0.tgz",
+      "integrity": "sha512-wXqjST+SLt7R009ySCglWBCFpjUygmCIfD790/kVbiGmUgfYGuB14PiTd5DwVxSV4NcYHjzMkoj5LjQZwTQLEA=="
     },
     "minify": {
       "version": "4.1.3",
@@ -8847,6 +8864,11 @@
         }
       }
     },
+    "mkdirp-classic": {
+      "version": "0.5.2",
+      "resolved": "https://registry.npmjs.org/mkdirp-classic/-/mkdirp-classic-0.5.2.tgz",
+      "integrity": "sha512-ejdnDQcR75gwknmMw/tx02AuRs8jCtqFoFqDZMjiNxsu85sRIJVXDKHuLYvUUPRBUtV2FpSZa9bL1BUa3BdR2g=="
+    },
     "mocha": {
       "version": "7.0.1",
       "resolved": "https://registry.npmjs.org/mocha/-/mocha-7.0.1.tgz",
@@ -9272,14 +9294,14 @@
       }
     },
     "napi-build-utils": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/napi-build-utils/-/napi-build-utils-1.0.1.tgz",
-      "integrity": "sha512-boQj1WFgQH3v4clhu3mTNfP+vOBxorDlE8EKiMjUlLG3C4qAESnn9AxIOkFgTR2c9LtzNjPrjS60cT27ZKBhaA=="
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/napi-build-utils/-/napi-build-utils-1.0.2.tgz",
+      "integrity": "sha512-ONmRUqK7zj7DWX0D9ADe03wbwOBZxNAfF20PlGfCWQcD3+/MakShIHrMqx9YwPTfxDdF1zLeL+RGZiR9kGMLdg=="
     },
     "needle": {
-      "version": "2.3.2",
-      "resolved": "https://registry.npmjs.org/needle/-/needle-2.3.2.tgz",
-      "integrity": "sha512-DUzITvPVDUy6vczKKYTnWc/pBZ0EnjMJnQ3y+Jo5zfKFimJs7S3HFCxCRZYB9FUZcrzUQr3WsmvZgddMEIZv6w==",
+      "version": "2.4.1",
+      "resolved": "https://registry.npmjs.org/needle/-/needle-2.4.1.tgz",
+      "integrity": "sha512-x/gi6ijr4B7fwl6WYL9FwlCvRQKGlUNvnceho8wxkwXqN8jvVmmmATTmZPRRG7b/yC1eode26C2HO9jl78Du9g==",
       "requires": {
         "debug": "^3.2.6",
         "iconv-lite": "^0.4.4",
@@ -9326,13 +9348,18 @@
       }
     },
     "node-abi": {
-      "version": "2.14.0",
-      "resolved": "https://registry.npmjs.org/node-abi/-/node-abi-2.14.0.tgz",
-      "integrity": "sha512-y54KGgEOHnRHlGQi7E5UiryRkH8bmksmQLj/9iLAjoje743YS+KaKB/sDYXgqtT0J16JT3c3AYJZNI98aU/kYg==",
+      "version": "2.15.0",
+      "resolved": "https://registry.npmjs.org/node-abi/-/node-abi-2.15.0.tgz",
+      "integrity": "sha512-FeLpTS0F39U7hHZU1srAK4Vx+5AHNVOTP+hxBNQknR/54laTHSFIJkDWDqiquY1LeLUgTfPN7sLPhMubx0PLAg==",
       "requires": {
         "semver": "^5.4.1"
       }
     },
+    "node-addon-api": {
+      "version": "1.7.1",
+      "resolved": "https://registry.npmjs.org/node-addon-api/-/node-addon-api-1.7.1.tgz",
+      "integrity": "sha512-2+DuKodWvwRTrCfKOeR24KIc5unKjOh8mz17NCzVnHWfjAdDqbfbjqh7gUT+BkXBRQM52+xCHciKWonJ3CbJMQ=="
+    },
     "node-environment-flags": {
       "version": "1.0.6",
       "resolved": "https://registry.npmjs.org/node-environment-flags/-/node-environment-flags-1.0.6.tgz",
@@ -9553,9 +9580,9 @@
       "integrity": "sha1-lKKxYzxPExdVMAfYlm/Q6EG2pMI="
     },
     "nopt": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/nopt/-/nopt-4.0.1.tgz",
-      "integrity": "sha1-0NRoWv1UFRk8jHUFYC0NF81kR00=",
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/nopt/-/nopt-4.0.3.tgz",
+      "integrity": "sha512-CvaGwVMztSMJLOeXPrez7fyfObdZqNUK1cPAEzLHrTybIua9pMdmmPR5YwtfNftIOMv3DPUhFaxsZMNTQO20Kg==",
       "requires": {
         "abbrev": "1",
         "osenv": "^0.1.4"
@@ -9908,9 +9935,9 @@
       }
     },
     "outdent": {
-      "version": "0.7.0",
-      "resolved": "https://registry.npmjs.org/outdent/-/outdent-0.7.0.tgz",
-      "integrity": "sha512-Ue462G+UIFoyQmOzapGIKWS3d/9NHeD/018WGEDZIhN2/VaQpVXbofMcZX0socv1fw4/tmEn7Vd3McOdPZfKzQ=="
+      "version": "0.7.1",
+      "resolved": "https://registry.npmjs.org/outdent/-/outdent-0.7.1.tgz",
+      "integrity": "sha512-VjIzdUHunL74DdhcwMDt5FhNDQ8NYmTkuW0B+usIV2afS9aWT/1c9z1TsnFW349TP3nxmYeUl7Z++XpJRByvgg=="
     },
     "p-cancelable": {
       "version": "1.1.0",
@@ -11122,9 +11149,9 @@
       }
     },
     "resin-image-fs": {
-      "version": "5.0.8",
-      "resolved": "https://registry.npmjs.org/resin-image-fs/-/resin-image-fs-5.0.8.tgz",
-      "integrity": "sha512-m3DPKAdErmgxMkOhGP9NOyqZor0DADkuDKb38XSjlhxj5lJMEtLi7AuZauyl4ysINc4u+ljMDW9IqGNpXhFcXw==",
+      "version": "5.0.9",
+      "resolved": "https://registry.npmjs.org/resin-image-fs/-/resin-image-fs-5.0.9.tgz",
+      "integrity": "sha512-fBCJjF6GeqRveum3cJCBf9E0AtIA7qtVccXU6bmoyEEixA0AxWDqp/nJ5+PjIL26/bpaX95vo7Mscyr8Q1UNfQ==",
       "requires": {
         "bluebird": "^3.5.1",
         "ext2fs": "^1.0.28",
@@ -11382,6 +11409,14 @@
       "resolved": "https://registry.npmjs.org/rw/-/rw-1.3.3.tgz",
       "integrity": "sha1-P4Yt+pGrdmsUiF700BEkv9oHT7Q="
     },
+    "rwmutex": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/rwmutex/-/rwmutex-1.0.0.tgz",
+      "integrity": "sha1-/dHqaoe3f0SecteF+eonTL4UDe0=",
+      "requires": {
+        "debug": "^3.0.1"
+      }
+    },
     "rx-lite": {
       "version": "4.0.8",
       "resolved": "https://registry.npmjs.org/rx-lite/-/rx-lite-4.0.8.tgz",
@@ -12727,22 +12762,22 @@
       }
     },
     "tar-fs": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-2.0.0.tgz",
-      "integrity": "sha512-vaY0obB6Om/fso8a8vakQBzwholQ7v5+uy+tF3Ozvxv1KNezmVQAiWtcNmMHFSFPqL3dJA8ha6gdtFbfX9mcxA==",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-2.0.1.tgz",
+      "integrity": "sha512-6tzWDMeroL87uF/+lin46k+Q+46rAJ0SyPGz7OW7wTgblI273hsBqk2C1j0/xNadNLKDTUL9BukSjB7cwgmlPA==",
       "requires": {
         "chownr": "^1.1.1",
-        "mkdirp": "^0.5.1",
+        "mkdirp-classic": "^0.5.2",
         "pump": "^3.0.0",
         "tar-stream": "^2.0.0"
       }
     },
     "tar-stream": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/tar-stream/-/tar-stream-2.1.0.tgz",
-      "integrity": "sha512-+DAn4Nb4+gz6WZigRzKEZl1QuJVOLtAwwF+WUxy1fJ6X63CaGaUAxJRD2KEn1OMfcbCjySTYpNC6WmfQoIEOdw==",
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/tar-stream/-/tar-stream-2.1.2.tgz",
+      "integrity": "sha512-UaF6FoJ32WqALZGOIAApXx+OdxhekNMChu6axLJR85zMMjXKWFGjbIRe+J6P4UnRGg9rAwWvbTT0oI7hD/Un7Q==",
       "requires": {
-        "bl": "^3.0.0",
+        "bl": "^4.0.1",
         "end-of-stream": "^1.4.1",
         "fs-constants": "^1.0.0",
         "inherits": "^2.0.3",
@@ -12750,9 +12785,9 @@
       },
       "dependencies": {
         "readable-stream": {
-          "version": "3.5.0",
-          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.5.0.tgz",
-          "integrity": "sha512-gSz026xs2LfxBPudDuI41V1lka8cxg64E66SGe78zJlsUofOg/yqwezdIcdfwik6B4h8LFmWPA9ef9X3FiNFLA==",
+          "version": "3.6.0",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.0.tgz",
+          "integrity": "sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==",
           "requires": {
             "inherits": "^2.0.3",
             "string_decoder": "^1.1.1",
@@ -13263,14 +13298,26 @@
       "integrity": "sha512-8OaIKfzL5cpx8eCMAhhvTlft8GYF8b2eQr6JkCyVdrgjcytyOmPCXrqXFcUnhonRpLlh5yxEZVohm6mzaowUOw=="
     },
     "udif": {
-      "version": "0.15.7",
-      "resolved": "https://registry.npmjs.org/udif/-/udif-0.15.7.tgz",
-      "integrity": "sha512-rLzT/RZs6aD13oKHcuU4XiKeJXWX0ZiL6GgTpXt21XWM4jSxOjZHurRwaPkXYmFpTqt+VSht06oUd5mx1KjpyA==",
+      "version": "0.17.0",
+      "resolved": "https://registry.npmjs.org/udif/-/udif-0.17.0.tgz",
+      "integrity": "sha512-59bQzrlk/MjbEg3Sv+jrCGOc44V4whyXE2ZlI5O3GWMECUpnM4Wfb5CUc20AV2Plbw8Owq6SaBJRbkkK1DSMPw==",
       "requires": {
         "apple-data-compression": "^0.4.0",
         "plist": "^3.0.1",
-        "readable-stream": "^2.3.6",
+        "readable-stream": "^3.3.0",
         "seek-bzip": "^1.0.5"
+      },
+      "dependencies": {
+        "readable-stream": {
+          "version": "3.6.0",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.0.tgz",
+          "integrity": "sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==",
+          "requires": {
+            "inherits": "^2.0.3",
+            "string_decoder": "^1.1.1",
+            "util-deprecate": "^1.0.1"
+          }
+        }
       }
     },
     "uglify-js": {
@@ -14469,4 +14516,4 @@
       }
     }
   }
-}
+}
\ No newline at end of file
diff --git a/package.json b/package.json
index 031ef756..f95c955d 100644
--- a/package.json
+++ b/package.json
@@ -55,13 +55,13 @@
     "@fortawesome/free-solid-svg-icons": "^5.11.2",
     "@fortawesome/react-fontawesome": "^0.1.7",
     "bindings": "^1.3.0",
-    "bluebird": "^3.5.3",
+    "bluebird": "^3.7.2",
     "bootstrap-sass": "^3.3.6",
     "color": "^2.0.1",
     "d3": "^4.13.0",
     "debug": "^3.1.0",
     "electron-updater": "4.0.6",
-    "etcher-sdk": "^2.0.17",
+    "etcher-sdk": "^3.0.1",
     "flexboxgrid": "^6.3.0",
     "immutable": "^3.8.1",
     "inactivity-timer": "^1.0.0",
@@ -88,6 +88,7 @@
   },
   "devDependencies": {
     "@types/bindings": "^1.3.0",
+    "@types/bluebird": "^3.5.30",
     "@types/chai": "^4.2.7",
     "@types/mime-types": "^2.1.0",
     "@types/mocha": "^5.2.7",
diff --git a/tests/gui/models/flash-state.spec.ts b/tests/gui/models/flash-state.spec.ts
index c9323f71..c1af703c 100644
--- a/tests/gui/models/flash-state.spec.ts
+++ b/tests/gui/models/flash-state.spec.ts
@@ -36,6 +36,7 @@ describe('Model: flashState', function() {
 					percentage: 50,
 					eta: 15,
 					speed: 100000000000,
+					averageSpeed: 100000000000,
 					totalSpeed: 200000000000,
 					bytes: 0,
 					position: 0,
@@ -51,6 +52,7 @@ describe('Model: flashState', function() {
 					failed: 0,
 					percentage: 0,
 					speed: null,
+					averageSpeed: null,
 					totalSpeed: null,
 				});
 			});
@@ -106,6 +108,7 @@ describe('Model: flashState', function() {
 						percentage: 50,
 						eta: 15,
 						speed: 100000000000,
+						averageSpeed: 100000000000,
 						totalSpeed: 200000000000,
 						bytes: 0,
 						position: 0,
@@ -126,6 +129,7 @@ describe('Model: flashState', function() {
 						percentage: 0,
 						eta: 15,
 						speed: 100000000000,
+						averageSpeed: 100000000000,
 						totalSpeed: 200000000000,
 						bytes: 0,
 						position: 0,
@@ -146,6 +150,7 @@ describe('Model: flashState', function() {
 						percentage: 101,
 						eta: 15,
 						speed: 0,
+						averageSpeed: 0,
 						totalSpeed: 1,
 						bytes: 0,
 						position: 0,
@@ -166,6 +171,7 @@ describe('Model: flashState', function() {
 						percentage: -1,
 						eta: 15,
 						speed: 0,
+						averageSpeed: 0,
 						totalSpeed: 1,
 						bytes: 0,
 						position: 0,
@@ -186,6 +192,7 @@ describe('Model: flashState', function() {
 						percentage: 50,
 						eta: 0,
 						speed: 100000000000,
+						averageSpeed: 100000000000,
 						totalSpeed: 200000000000,
 						bytes: 0,
 						position: 0,
@@ -207,6 +214,7 @@ describe('Model: flashState', function() {
 						// @ts-ignore
 						eta: '15',
 						speed: 100000000000,
+						averageSpeed: 100000000000,
 						totalSpeed: 200000000000,
 						bytes: 0,
 						position: 0,
@@ -227,6 +235,7 @@ describe('Model: flashState', function() {
 						type: 'flashing',
 						percentage: 50,
 						eta: 15,
+						averageSpeed: 0,
 						totalSpeed: 1,
 						bytes: 0,
 						position: 0,
@@ -247,6 +256,7 @@ describe('Model: flashState', function() {
 						percentage: 50,
 						eta: 15,
 						speed: 0,
+						averageSpeed: 0,
 						totalSpeed: 1,
 						bytes: 0,
 						position: 0,
@@ -268,6 +278,7 @@ describe('Model: flashState', function() {
 						percentage: 50,
 						eta: 15,
 						speed: 1,
+						averageSpeed: 1,
 						bytes: 0,
 						position: 0,
 						active: 0,
@@ -287,6 +298,7 @@ describe('Model: flashState', function() {
 						percentage: 50,
 						eta: 15,
 						speed: 0,
+						averageSpeed: 0,
 						totalSpeed: 0,
 						bytes: 0,
 						position: 0,
@@ -306,6 +318,7 @@ describe('Model: flashState', function() {
 					percentage: 50.253559459485,
 					eta: 15,
 					speed: 0,
+					averageSpeed: 0,
 					totalSpeed: 1,
 					bytes: 0,
 					position: 0,
@@ -330,6 +343,7 @@ describe('Model: flashState', function() {
 						percentage: 0,
 						eta: 0,
 						speed: 0,
+						averageSpeed: 0,
 						totalSpeed: 0,
 						bytes: 0,
 						position: 0,
@@ -350,6 +364,7 @@ describe('Model: flashState', function() {
 						percentage: 0,
 						eta: 0,
 						speed: 0,
+						averageSpeed: 0,
 						totalSpeed: 0,
 						bytes: 0,
 						position: 0,
@@ -386,6 +401,7 @@ describe('Model: flashState', function() {
 					failed: 0,
 					percentage: 0,
 					speed: null,
+					averageSpeed: null,
 					totalSpeed: null,
 				});
 			});
@@ -399,6 +415,7 @@ describe('Model: flashState', function() {
 					percentage: 50,
 					eta: 15,
 					speed: 0,
+					averageSpeed: 0,
 					totalSpeed: 0,
 					bytes: 0,
 					position: 0,
@@ -417,6 +434,7 @@ describe('Model: flashState', function() {
 					percentage: 50,
 					eta: 15,
 					speed: 0,
+					averageSpeed: 0,
 					totalSpeed: 0,
 					bytes: 0,
 					position: 0,
@@ -522,6 +540,7 @@ describe('Model: flashState', function() {
 					percentage: 50,
 					eta: 15,
 					speed: 100000000000,
+					averageSpeed: 100000000000,
 					totalSpeed: 200000000000,
 					bytes: 0,
 					position: 0,
@@ -535,6 +554,7 @@ describe('Model: flashState', function() {
 					failed: 0,
 					percentage: 0,
 					speed: 0,
+					averageSpeed: 0,
 					totalSpeed: 0,
 				});
 
@@ -550,6 +570,7 @@ describe('Model: flashState', function() {
 					failed: 0,
 					percentage: 0,
 					speed: null,
+					averageSpeed: null,
 					totalSpeed: null,
 				});
 			});