At least compress the files...
I will, but even then they're quite large.
I've looked around on various websites, trying to figure out what sorts of hard drives are the most reliable, but haven't been able to reach any sort of conclusion, it's a mess of mixed results. HDD or SSD? Hitachi? WD? Seagate? Ugh... I have multiple old hard drives sitting around but they're mostly from different brands and types (only one has failed so far), so I don't have any personal experience to go by when choosing the next set.
You could try compressing some of that video in a lossless quality. What do you need uncompressed video for anyway? Youtube forgets the quality so hard it doesn't matter at all, you could just do mp4 with a bitrate of 8000 and it wouldn't look any different after uploading
I compress the videos before uploading them, but I also take still frames from the uncompressed videos as screenshots - can't stand any sort of fuzz on those. Still, I could probably get rid of a lot if I took the time to sort through it... But when you've got hours and hours of video (including a complete playthrough of LU that's over 40 hours long), and a ton of other projects, it doesn't happen very quickly.