Don’t seagate drives have a high failure rate though? I remember seeing a few years ago a lot of people having issues with seagate drives failing, which is why I’ve never got one.
And i am in a similar situation to the OP, need a second internal drive to supplement my main boot drive in case it’s replacement fails. Had some drastic hardware failure issues last week, and i think we’ve narrowed it down to the SSD boot drive (POST state LEDs seem to indicate it’s the boot device, so looks like the drive is borked).
Unfortunately i don’t have any secondary internal drives i can test, apart from an external 3.5 inch drive that’s in a sealed enclosure, and i can’t open that without damaging the drive, i think. Plus we had to remove the single drive cage from the bottom of my case to make way for power cables.
So I’m either stuck with buying a second ssd along with the replacement for the boot device, or trying to find something i can use to support a 3.5 drive in a spot where it’s not technically supported.