Add automatic offline update pre condition

Signed-off-by: Sudarshan C Psudarshan.cp2@in.bosch.com

content/guides/ostree.md

@@ -69,6 +69,21 @@ with special name `static-update.bundle` and attach that device into
 the target system. AUM will automatically detect the update file and try
 to use it for the system upgrade.
 
+{{% notice info %}}
+Automatic offline update will be triggered only in case of USB drive should have single partition
+and the delta file is renamed as mentioned above.
+Step to check and create partition table on Apertis SDK.
+	$lsblk
+    $sudo fdisk /dev/<drive in which usb is mounted e.g /dev/sdb>
+Enter the below options :
+	p - list the partition
+	d - delete the partition
+	n - create the partition (create single partition with full size)
+	w - write the partition
+Set FAT32 file system type:
+	$sudo mkfs -t vfat /dev/<drive in which usb drive is mounted e.g /dev/sdb1>
+{{% /notice %}}
+
 ### Manual offline update
 
 It is possible to update the system manually from local file with CLI,