So to be clear, I already have a working unraid server. I understand that the operating system runs in RAM and doesn't particularly strain the USB drive it boots from, but i would still like to have a backup on hand in case it fails. When setting up unraid initially, I had a pretty difficult time getting a USB drive it would accept. I would like to to know for sure I have a drive that unraid will accept so I don't have to go a some period of ordering a drive, having it not work, ordering a new one, etc So is there a way to know a USB drive will work ahead of time? Or would I not know until I actually try to transfer my license?