There's a small chance something is wrong with my computer and not the SD Card, or it's just a bad coincidence. My "games" HDD has been getting super slow for downloading so I'm running CHKDSK. It's been going got 11 hours now and is only 17% done with stage 4. But it's actually making progress slowly but surely. It might just be a failing hard drive but it makes me wonder if my motherboard is making disk writes in general get fucky? Idk. I feel like I would've noticed major problems sooner if that were the case though.

Update: It's been over 36 hours and it's still chking that dsk! Slowly but surely.