USB Drive read only can't be formatted

Hi, I have a 64gb USB drive that switched (by itself?) to "read only", I can't format the drive in Disk Utility (gray words).
I've tried with terminal (sudo)
I've tried in a Windows 7 (regedit section), D.O.S. DISKPART & clear...format etc and didn't work.
The Windows 7 (in a PC) doesn't recognise the drive, I've installed couple of apps that at least they pointed the drive is there but don't allow me to initialise or format.
At the moment I've the drive plugged in my iMac, when I go to info it says:

MS-DOS (FAT32)
Capacity: 64GB
Available 49GB
Used 15GB (I've some data there and they work fine)
Sharing & Permissions: Read Only

I did a "Verify Disk" (Disk Utility) and this is what I got:

Verifying volume “PENDRIVE64G”Verifying file system.** /dev/rdisk1s1
** Phase 1 - Preparing FAT
** Phase 2 - Checking Directories
** Phase 3 - Checking for Orphan Clusters
Free space in FSInfo block (1494062) not correct (1494063)
Fix? no
119 files, 47810016 KiB free (1494063 clusters)
File system check exit code is 8.Error: This disk needs to be repaired. Click Repair Disk.


It says "Click to repair disk" but it is grey and doesn't allow me, pls help! it is a 64GB one and don't want it ends up inside the bin!! thanks!

If the 64 GB flash drive does not have a read only switch, (check to make sure) then I suspect the drive is defective. Flash drives are easily corrupted especially if they have been improperly ejected.

chscag said:

If the 64 GB flash drive does not have a read only switch, (check to make sure) then I suspect the drive is defective. Flash drives are easily corrupted especially if they have been improperly ejected.

Click to expand...

it's strange because in PC (Win 7) can't be read, although is FAT32 format but can be read in OSX, (read only).

Is this a behaviour the drive is dead and ready for the coffin? I thought if it's dead I wouldn't read any of the files inside but I can?

Any hope?

It sure sounds like your 64 GB Flash Drive is defective. If it can't be read by Windows 7 and the drive is formatted to FAT-32, it's very likely corrupt. Keep trying, who knows, you may get lucky and it will come alive again. If the drive is read only from your Mac, you still should be able to copy data off it. Have you tried?

chscag said:

It sure sounds like your 64 GB Flash Drive is defective. If it can't be read by Windows 7 and the drive is formatted to FAT-32, it's very likely corrupt. Keep trying, who knows, you may get lucky and it will come alive again. If the drive is read only from your Mac, you still should be able to copy data off it. Have you tried?

Click to expand...

I can copy those files on the desktop but can't copy any file from the desktop to the drive, actually the files that are inside are not important (have same files in the HDD), what were important was to try to install Win 7 in bootcamp and have to do it from the USB driver (the SD is not working). But yes...I guess is time to start asking for prices and keep it beside for a while till have any miraculous solution to bring it back to life...