For something like a hard drive, a warranty is of little value unless it includes your data. It's not very useful to get a drive replaced under warranty - but still not have the data it held.
Or as a (printed) advert I recall many years ago put it ...
There was a picture of lighthouse, out at sea, with waves crashing all around it. The advert was for a particular brand of Tv that I don't recall. But the message was that the staff of the lighthouse would prefer a reliable TV rather than a good repair service !
My view of hard disks is the same : I'd rather have confidence that the data I store can be retrieved, rather than an assurance that I'll get a replacement blank drive when it breaks.