I believe I may have screwed up, I accidently disabled all access to my harddrive in the security tab, if you check out the video you'll see what's up. How do I get full access to my HDD again? Also (in the second video) I'm trying to figure out why there's 4 partitions on the HDD but I can't extend them to the main drive.
First video
Second video
First video
Second video