I checked the Seagate HDD. Yes, you can see large values in the usual 01 and 07 values. This is a very common issue if you know what to look for.
The SSD looks to be in excellent health.
Pre-answers. No, you can't keep this failing HDD in your PC. No, so far no one has fixed such a HDD. No, it has to go away.
Every time I start a download, no matter on which drive, my pc freezes completely and the internet is cut off for a while. I share my mobile network to my pc, could that be a problem?
(can't publish a speccy link for some reason, here's a file https://ufile.io/013kj4p4 )
EDIT: Did some tests, when I plug in my normal internet (it's currently limited to 60kb/s), the pc doesn't freeze and downloads fine. My new question is, could it be my mobile freezing my pc or my hdd/ssd not keeping up with 31Mb/s? (mobile net speed)
EDIT 2: I also get a watchdog_dpc violation, might that be an issue with my SanDisk ssd?
I've also heard seagates might cause this error, although I don't think that's the case as I had the same problems before buying it.