[Defraggler crashes on one of my drives]

Yep. Defrags just fine with any other defragger, and all SMART data looks good.

I'm running Windows 10 Pro x64. I tried both the 32 and 64 bit versions of Defraggler with no difference.

[Defraggler crashes on one of my drives]

Hey guys. I've just downloaded and am testing Defraggler, and it seems to be a pretty good defragging program. The problem, however, is that whenever I tell it to analyze one of my HDD's, it just crashes immediately. It doesn't matter whether I click the Analyze or Optimize buttons, Defraggler just dies instantly. The SMART data appears just fine in Defraggler. It's just the defragging that's impossible.

I have four other drives that Defraggler works splendidly on. The drives are a mix of new and old, SSD and HDD, and different brands, but the one that Defraggler crashes on is my newest.. a 4TB Seagate BarraCuda, that's maybe 3-4 months old.

Any thoughts as to what might be going on?