I’m still confused RickDan.
The utility to format the drive runs under Windows? Or is it a standalone utility that boots from a CD or USB? If the utility runs under Windows and Windows can read the drive it could mean that the utility doesn’t support removable drives or Windows security is preventing it from seeing the drive.
As for “I’ve tried to boot at secure mode and don’t worked.” does that mean you couldn’t boot to Safe mode or you booted to it and the format utility didn’t work.
Another option might be to try a utility like Parted Magic to format the drive or at least see if it can write to the drive. If it can write to the drive the problem is Windows. If it can’t the problem is the drive.
