So I have two HDDs, and 2TB internal and a 4TB Seagate external. For the internal, CrystalDiskInfo gave me a two cautions: Current Pending Sector Count 16 and Uncorrectable Sector Count 16. These numbers have been the same for a few months now. HD Tune gave me an 'Ok' health status with two yellow warnings:
The second drive, my external, is more worrying. HD Tune gives me no information on it, but it does give me an incorrect storage capacity (it thinks there is only 2199GB). CrystalDiskInfo gives me three cautions: Reallocated sectors count 112, Current Pending Sector Count 176 and Uncorrectable Sector Count 176. These already seem too high and on top of that, before I had checked it yesterday it had been sitting on something like a count of 10 for the reallocated sectors count and nothing else. It got dropped but an immediate check showed nothing changed. It was only yesterday I noticed these extra errors, but they were still below 30, after running some quick scans it started to jump up to the nu,bers I have now.
The internal drive will be four years old by october, the external drive will reach one year by june.

The second drive, my external, is more worrying. HD Tune gives me no information on it, but it does give me an incorrect storage capacity (it thinks there is only 2199GB). CrystalDiskInfo gives me three cautions: Reallocated sectors count 112, Current Pending Sector Count 176 and Uncorrectable Sector Count 176. These already seem too high and on top of that, before I had checked it yesterday it had been sitting on something like a count of 10 for the reallocated sectors count and nothing else. It got dropped but an immediate check showed nothing changed. It was only yesterday I noticed these extra errors, but they were still below 30, after running some quick scans it started to jump up to the nu,bers I have now.
The internal drive will be four years old by october, the external drive will reach one year by june.