It appears to work fine (it contains my home partition for my main machine I daily drive) and I haven’t noticed signs of failure. Not noticeably slow either. I used to boot Windows off of it once upon a time which was incredibly slow to start up, but I haven’t noticed slowness since using it for my home partition for my personal files.
Articles online seem to suggest the life expectancy for an HDD is 5–7 years. Should I be worried? How do I know when to get a new drive?
As long as you have multiple backups of your data, you shouldn’t be concerned. HDDs as well as SDDs can potentially fail at any given time.
The key is to have more than one backup. You shouldn#t rely on only one backup alone.