Get USB key Full Space back ?

[fgu]

Hi,

I have got a 16GB usb key.
The different images I've got restore 4Go or 8Go.. but none restore 16Go ones.
How can I recover full space back after using USB Image Tool ?
Is there any soft to manage USB Key ? Windows cannot handle it ! Have you got any image filled with zeros to restore any size of USB key ?
Thanks.

[Alex]

In version 1.61, there is a Reset button. After that, Windows should be able to format the drive with it's original size. Another option would be to use the HP USB Disk Storage Format Tool (just google it)-