diff --git a/homeassistant/components/number/__init__.py b/homeassistant/components/number/__init__.py
index ae4d2e5a762..11bd4018ee4 100644
--- a/homeassistant/components/number/__init__.py
+++ b/homeassistant/components/number/__init__.py
@@ -93,6 +93,12 @@ class NumberDeviceClass(StrEnum):
     Unit of measurement: `A`
     """
 
+    DATA_SIZE = "data_size"
+    """Data size.
+
+    Unit of measurement: UnitOfInformation
+    """
+
     DISTANCE = "distance"
     """Generic distance.
 
diff --git a/homeassistant/components/sensor/__init__.py b/homeassistant/components/sensor/__init__.py
index 3489bc3f895..e1c799018a4 100644
--- a/homeassistant/components/sensor/__init__.py
+++ b/homeassistant/components/sensor/__init__.py
@@ -157,6 +157,12 @@ class SensorDeviceClass(StrEnum):
     Unit of measurement: `A`
     """
 
+    DATA_SIZE = "data_size"
+    """Data size.
+
+    Unit of measurement: UnitOfInformation
+    """
+
     DISTANCE = "distance"
     """Generic distance.
 
diff --git a/homeassistant/components/sensor/device_condition.py b/homeassistant/components/sensor/device_condition.py
index 34a2590ce8e..3f5d701f5f0 100644
--- a/homeassistant/components/sensor/device_condition.py
+++ b/homeassistant/components/sensor/device_condition.py
@@ -36,6 +36,7 @@ CONF_IS_BATTERY_LEVEL = "is_battery_level"
 CONF_IS_CO = "is_carbon_monoxide"
 CONF_IS_CO2 = "is_carbon_dioxide"
 CONF_IS_CURRENT = "is_current"
+CONF_IS_DATA_SIZE = "is_data_size"
 CONF_IS_DISTANCE = "is_distance"
 CONF_IS_ENERGY = "is_energy"
 CONF_IS_FREQUENCY = "is_frequency"
@@ -74,6 +75,7 @@ ENTITY_CONDITIONS = {
     SensorDeviceClass.CO: [{CONF_TYPE: CONF_IS_CO}],
     SensorDeviceClass.CO2: [{CONF_TYPE: CONF_IS_CO2}],
     SensorDeviceClass.CURRENT: [{CONF_TYPE: CONF_IS_CURRENT}],
+    SensorDeviceClass.DATA_SIZE: [{CONF_TYPE: CONF_IS_DATA_SIZE}],
     SensorDeviceClass.DISTANCE: [{CONF_TYPE: CONF_IS_DISTANCE}],
     SensorDeviceClass.ENERGY: [{CONF_TYPE: CONF_IS_ENERGY}],
     SensorDeviceClass.FREQUENCY: [{CONF_TYPE: CONF_IS_FREQUENCY}],
@@ -122,6 +124,7 @@ CONDITION_SCHEMA = vol.All(
                     CONF_IS_CO,
                     CONF_IS_CO2,
                     CONF_IS_CURRENT,
+                    CONF_IS_DATA_SIZE,
                     CONF_IS_DISTANCE,
                     CONF_IS_ENERGY,
                     CONF_IS_FREQUENCY,
diff --git a/homeassistant/components/sensor/device_trigger.py b/homeassistant/components/sensor/device_trigger.py
index c1b0699664e..7a609afe09e 100644
--- a/homeassistant/components/sensor/device_trigger.py
+++ b/homeassistant/components/sensor/device_trigger.py
@@ -35,6 +35,7 @@ CONF_BATTERY_LEVEL = "battery_level"
 CONF_CO = "carbon_monoxide"
 CONF_CO2 = "carbon_dioxide"
 CONF_CURRENT = "current"
+CONF_DATA_SIZE = "data_size"
 CONF_DISTANCE = "distance"
 CONF_ENERGY = "energy"
 CONF_FREQUENCY = "frequency"
@@ -73,6 +74,7 @@ ENTITY_TRIGGERS = {
     SensorDeviceClass.CO: [{CONF_TYPE: CONF_CO}],
     SensorDeviceClass.CO2: [{CONF_TYPE: CONF_CO2}],
     SensorDeviceClass.CURRENT: [{CONF_TYPE: CONF_CURRENT}],
+    SensorDeviceClass.DATA_SIZE: [{CONF_TYPE: CONF_DATA_SIZE}],
     SensorDeviceClass.DISTANCE: [{CONF_TYPE: CONF_DISTANCE}],
     SensorDeviceClass.ENERGY: [{CONF_TYPE: CONF_ENERGY}],
     SensorDeviceClass.FREQUENCY: [{CONF_TYPE: CONF_FREQUENCY}],
@@ -122,6 +124,7 @@ TRIGGER_SCHEMA = vol.All(
                     CONF_CO,
                     CONF_CO2,
                     CONF_CURRENT,
+                    CONF_DATA_SIZE,
                     CONF_DISTANCE,
                     CONF_ENERGY,
                     CONF_FREQUENCY,
diff --git a/homeassistant/components/sensor/strings.json b/homeassistant/components/sensor/strings.json
index 12c902816b1..a1407009ed2 100644
--- a/homeassistant/components/sensor/strings.json
+++ b/homeassistant/components/sensor/strings.json
@@ -7,6 +7,7 @@
       "is_carbon_monoxide": "Current {entity_name} carbon monoxide concentration level",
       "is_carbon_dioxide": "Current {entity_name} carbon dioxide concentration level",
       "is_current": "Current {entity_name} current",
+      "is_data_size": "Current {entity_name} data size",
       "is_distance": "Current {entity_name} distance",
       "is_energy": "Current {entity_name} energy",
       "is_frequency": "Current {entity_name} frequency",
@@ -42,6 +43,7 @@
       "carbon_monoxide": "{entity_name} carbon monoxide concentration changes",
       "carbon_dioxide": "{entity_name} carbon dioxide concentration changes",
       "current": "{entity_name} current changes",
+      "data_size": "{entity_name} data size changes",
       "distance": "{entity_name} distance changes",
       "energy": "{entity_name} energy changes",
       "frequency": "{entity_name} frequency changes",
diff --git a/homeassistant/components/sensor/translations/en.json b/homeassistant/components/sensor/translations/en.json
index 7fbb6e4a336..56206c3329e 100644
--- a/homeassistant/components/sensor/translations/en.json
+++ b/homeassistant/components/sensor/translations/en.json
@@ -6,6 +6,7 @@
             "is_carbon_dioxide": "Current {entity_name} carbon dioxide concentration level",
             "is_carbon_monoxide": "Current {entity_name} carbon monoxide concentration level",
             "is_current": "Current {entity_name} current",
+            "is_data_size": "Current {entity_name} data size",
             "is_distance": "Current {entity_name} distance",
             "is_energy": "Current {entity_name} energy",
             "is_frequency": "Current {entity_name} frequency",
@@ -41,6 +42,7 @@
             "carbon_dioxide": "{entity_name} carbon dioxide concentration changes",
             "carbon_monoxide": "{entity_name} carbon monoxide concentration changes",
             "current": "{entity_name} current changes",
+            "data_size": "{entity_name} data size changes",
             "distance": "{entity_name} distance changes",
             "energy": "{entity_name} energy changes",
             "frequency": "{entity_name} frequency changes",