Be sure you read their terms regarding external or network-connected drives. I remember something about them not allowing some form of drive external to your computer (because otherwise you could back up several computers, when they want you to pay $20/mo per computer)

If your elitedesk can fit two drives and has a USB slot, honestly just a flash drive with a bootable Linux image. The ‘dd’ command has the capability to copy one drive to another

Really enjoying the app! It has left a great impression after an ~hour of use