diff --git a/Documentation/partition.md b/Documentation/partition.md
index bb7d9294e..1da60a1f9 100644
--- a/Documentation/partition.md
+++ b/Documentation/partition.md
@@ -34,7 +34,9 @@ A visual representation looks like this:
 
 Sometime the bootloader part can look different because there can be firmware or SPLs for boot the CPU on the SoC.
 
-## Data
+## Data disk
+
+![Data-Disk preview](./usb-disk.png)
 
 The data partition is the only partition with real I/O. It will be expanded automatically at boot to the full size of the disk.
 
diff --git a/Documentation/usb-disk.png b/Documentation/usb-disk.png
new file mode 100644
index 000000000..c06cebdf6
Binary files /dev/null and b/Documentation/usb-disk.png differ