im literally losing my mind here my gaming sessions have turned into slideshows. heres Task Manager while a large online shooter is running:

Disk 0 (C:) Active time 100%
Not responding
The drive is an old hard drive. It started a couple of weeks ago out of nowhere. Before i buy a new drive, how do i find whats actually using it?
The drive isnt that old, and i havent noticed anything else strange. Before i spend money on new storage, i wanna be sure its actually teh hardware. pls help 🙏