[FIXED]
I got one of my Samsung 1TB F1 drives out earlier to do some backups, dropped it into my Sharkoon Quick SATA and used Allway Sync to back the files up. A bit later I came back to my PC, and it was virtually unusable, only being responsive for 10 seconds every 5 minutes. I rebooted, started the sync again and the same thing happened. I also noticed that the disk access light on the Sharkoon seemed to be far more intermittent than I would expect it to be.
Hence, I think it might be on its way out, but I'm not sure how to check to see if it is the fault of the disk, considering it's attached by USB. Obviously I can take it out and attach it to the motherboard if necessary, but it would have to be a last resort as all the cables would need re-arranging.
Does anyone have any thoughts on what might be up, and how to check?