This is somewhat recent. The drive was fine 2 months ago. Then out of nowhere it starts having issues when moving files to it from my ssd. It copies fine for the first minute or two, then I get an error message, 0x800701b1 'a device which does not exist was specified'. I tried looking the issue up but can't find anything quite like my problem. After this happens, I can't do anything with the drive other than browse the folder i most recently tried moving. Can't delete, move, or copy stuff. Older folders don't open, again saying the device does not exist. Trying to scan/repair it gives a similar error. The only fix is restarting the pc, at which point it's accessible until I again try to move/copy files to it. Any ideas?