if you actively use seagate barracuda hd's, start backup now and thank me later.
yes, Seagate Barracudas fail, and Western Digital Caviars too, and Hitachi-Toshiba too...
In the years I've installed maybe 250 hard drives, and I have about 30 defective units on my shelves.
In this precise moment I'm retrieving data from a FULL 2 TB Hitachi drive. Windows says it is not formatted, but EaseUS is trying to recover (4 hours to completion..)
Hope everithing goes well: the files are the final edited photos of maybe 25 marriages, and my cousin, the professional photographer, has no backup.
The backup is of the unedited photos.. He has about 30 external 2 or 3 TB drives, and in 4 years he had 4 total failures, plus 4 or 5 problems that were solved with no data losses.
External drives are, to my experience, more prone to failure than the internal ones. Maybe it is a temperature problem, maybe is mishandling.
Never trust an external drive.