OK, I recently bought a new thumb drive and was using a tool to encrypt it. It failed about half way through and my 16gig drive is registering as 7.83 I've used DiskManager and Command Prompt to try and reformat it to get the rest of the space. Also, in disk manager there is no unallocated space registering and for some reason I have the option of ejecting the drive? May have mounted a 7.53gig on it? After I eject it obviously, it just shows up like an empty memory card reader or something else with removable media.