I backed everything up. My specs are in my signature. I believe it is the 250GB Barracuda that is giving the error.Some details on the drive and system?
But, you should ALWAYS be concerned about a drive dying, and take steps to protect your data.
Before you do ANYTHING else....start a good backup routine.
Then we can look into investigating this potentially dying drive.
Run CrystalDiskInfo, and whatever tool Seagate provides.
But...a 250GB HDD is pretty old.
Likely it IS dying.