I have a SSD with Windows on it, which is my C:\ drive. (90GB Corsair F100 SSD) I have an internal HDD and is my D:\ drive. (3TB Western Digital HDD) I also have an external 1TB Seagate HDD but that isn't important here. Anyway, I've noticed my C:\ drive is saying it's full. Completely full! A few months ago I noticed it was getting full and Google suggested turning off Hibernation, and it seemed to do the trick, but now it's filled up again! Here is a screenshot of my HDDs: Due to the massive amount of space on the D:\ drive, that's where my Users, Program Files and Program Files (x86) folders are stored. I did this when I first installed Windows 7, using a Registry tweak that redirects all the Users folders to the D:\ drive, like this screenshot shows: There was a lot to alter but I won't screenshot every step; it's easy to find on Google. If I go to my C:\ drive the folders I moved are just shown as shortcuts: But when I click on them, the address bar at the top still says they are on the C:\ drive: And if I go back and click on the Properties for the Users folder it not only says it's on the C:\ drive, it also says it's 1.5TB in size, which is just mind-boggling. What's going on? But if I navigate to the D:\ drive and click on Users I get the same folder! Confusing, right? I downloaded a program called DriveSpacio which tells you where all the space is gone, basically, and shows you the exact size of every folder. When I use it to scan my C:\ drive it shows the Users folder and the Program Files folders are taking up all the space. They're meant to be on the D:\ drive though! I will run a scan of the C:\ drive first and post the results below: And if I click on the Users\Baz folder: Everything that's supposed to be on the D:\ drive! And now I will run a scan of the D:\ drive and post the results too: They're there too? I ran Disc Cleanup on my C:\ drive to see if it could suggest anything to delete and it was empty: Yet the Low Disk Space alert keeps popping up. If anyone could help me figure this out, I'd really appreciate it. I'm even happy to go on TeamViewer if you wanna poke around on regedit, if you know what you're doing, to make sure all the linked folders were set up correctly. All suggestions welcome!