If one does not properly remove a USB dreive, especially if the drive is active, I find that I can usually go into Disk Management and fix things by just assigning a drive letter. Not sure if tghat will always work. I was wondering, if after a power outage, ADD would be able to recover partitions on a USB drive, assuming that the only thing that got munged was the file system? I'm askling because I'm thinking of replacing a UPS that has 8 outlets, but only 4 have power backup, the other 4 are surge protect only. I need 5 for a particular system: CPU, monitor, router, 2 USB drives. I might be able to move te router to anoter UPS, but not sure yet.