Hi,
From your description, I think the following method could help you solve the problem:
Click “start” menu, click ”Run”, type ”cmd”, enter.
Assuming that you USB letter is “H”, then type “H:” enter.
type" attrib –h –s -r /s /d *.* ”, then enter
after attrib put a space and space every as you see (-h) is one no space but space after then (-s) is one like that..(/s) is also one and (*.*) is one hope u uderstand.
leave " " out just type attrib –h –s -r /s /d just used them to demonstrate to u.
If u do everything right it may take a while then you will see H:> again then
Re-open your USB, everything return to normal?
More information, please refer to the following page:
Attrib
http://technet.microsoft.com/en-us/library/bb490868.aspx
Regards,