A subforum search, using the magnifying glass icon upper right, for creating a backup img file brings up several threads…
https://community.wd.com/t/how-can-i-make-the-virgin-disk-imgae-of-my-cloud-2tb/91142/5
https://community.wd.com/t/unbrick-with-clean-03-04-01-230-bittorrent-firmware/93261/16
The command goes something like this to save the img file to the Public Share on the first generation single bay v3.x/v4.x firmware My Cloud:
dd if=/dev/sda of=/DataVolume/shares/Public/mycloud.img bs=1M count=5000
Note: You probably want to do this on a My Cloud that doesn’t have any user data copied to it yet and you probably want to do a 40 second reset via the reset button on the back of the My Cloud, or use the Dashboard >Settings > Utilities > System Restore to reset the My Cloud to default values, or use the Dashboard >Settings > Utilities > Quick Restore which erases all user data and resets the My Cloud to default.
