I have been using a 1 gigabyte USB storage device with no problems until now. I'm getting a message that the disk is unformatted?? When I check through Device Manager it says the device is working normally but it is obviously not working. Is there anything I can do?

Have you tried plugging it in multiple times?

Have you tried it on different computers?

Yes to both questions. Same result in a second computer

Unfortunately it could be the drive.

Where do you get this Format message?

How is it defined under Disk Management?

Is it seen as "unallocated"?

I get the unformatted message when I click on the device in Windows explorer. I'm not sure where disk manager is.
I haven't seen anything that said "unallocated.
What I can't understand is the device was working fine one minute and the next (literally) it had this problem. It wasn't removed, bumped etc.
I hate to think how much stuff I've lost if this isn't recoverable!

right click My Computer then click Manage then Disk Management

It shows as 128MB disk online "Healthy"
It really is a 1 gigabyte device though.
The troubleshooting option doesn't seem to help.

Is it seen as 100% Free?

128MB is Total (Capacity)?

Under properties it shows Type: Removable disk
Flie system: RAW
Used Space: 0 bytes
Free Space: 0 bytes
Capacity: 0 bytes

Doesn't seem logical??

Only logical if it were broken or empty. Sorry. Reformatting would test the difference but I understand you have data involved.

Back under Disk Management:

Is it seen as 100% Free?

128MB is Total (Capacity)?

What is the file type there?