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.

HP USB Disk Storage Format Utility
Http://downloads.pcworld.com/pub/new/utilities/peripherals/SP27608.exe

Will format most USB flash drive
It can be known to recover Flash drives that are un-responsive too.



If that doesn't work try this one:

Hard Disk Low Level Format Tool



Please let me know of the outcome

Not Sure....

Well I tried both of them it looks like its only going to reformat the visible space. Im not sure what else there is to do lol....

Device size: 15,794,176 sectors
[8086.61 Mbytes]

this is pretty much what ive gotten with everything ive tried...

You can try another computer just to eliminate yours
Or you could try searching the USB drive's manufacture website for any specialized tool (if exists)
Note I understand that some drives are very difficult to locate what manufacture it is, in the first place

Note: there is also a guide in the Storage & Networking forum pinned up the top, that may help

If DiskManager only see 7,5GB, it can only format 7.5GB, probably the reason the format hung the first time you tried.
Compability issues

What is the name of the USB thumbdrive? Who made it?