It’s just the cheapest type of drive there is. The use case is in large scale RAIDs where one disk failing isn’t a big issue. They tend to have decent warranty but under heavy load they’re not expected to last multiple years. Personally I use drives like this but I make sure to have them in a RAID and with backup, anything else would be foolish. Do also note that expensive NAS drives aren’t guaranteed to last either so a RAID is always recommended.