Ok, I'm a bit confused by your post...is this an internal or an external hard drive?
Saying it's a barracuda indicates an internal drive but saying a freeagent usb device indicates an external drive...
How exactly are you connecting the drive to your computer? Is it internally or through USB?
If a drive is showing the incorrect capacity, it's usually a faulty drive...you'll try the basic detection steps with different cables, ports, and computers. If it's not detected with the right capacity, it's bad...you can try to run seatools but I'd bet it would fail the tests.
As for the data, try different data recovery software...if it can't pull the data...you may need to try other methods of data recovery at that point...then look into possibly replacing the drive.
To all users: If your data is stored ONLY on an external hard drive, then it is NOT a backup. A BACKUP is having the data stored in TWO or MORE locations. If it is only in ONE location, you don't have a backup at all. If the data is important to you, then have it stored in multiple locations to prevent data loss.
