I have one HUH721212ALE601 hard disk. It has racked up 32558 hours so far.

So far the disk has allocated 5 sector replacements which is par for the course. Crystal disk info figures the disk is unhealthy. This disk is 12TB so its had quite a history of use in my machines. Disk still works fine.

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USB 3.5" enclosures are $19 USD postage paid from China, I own several