For PC Bore: My SSD only has a few gigabytes left. However I've been keeping everything on a 1 TB HDD. I've been looking everywhere to figure out what keeps filling up the SSD but I can't find anything. Is there a tool out there that will let me look at all of the files on my SSD so I can identify just what the hell keeps using up more and more of my SSD space?
TreeSize. Displays a breakdown of all folders and files and also accounts for hardlinks in Windows 7 and 8, which can make folders and files look bigger than they actually are (i.e., WinSxS).
Microsoft just Tuesday released a patch that moves to remove old Windows Update files that it previously held onto in the WinSxS directory. Your problem is that Microsoft designed Windows 7 and 8 to get rid of the old DLL hell where you'd be missing install/required files that couldn't be repaired when the related program became corrupted. Thus, W7 & 8 hold on to pretty much everything that is ever downloaded via Windows Update in the Windows\WinSxS directory, and you can't delete it. Same for the Installer folder - MS Office alone takes up an extra gig or so in that folder, on top of the MSOCache directory and the Office folder itself. In essence, the Windows directory will become inexorably bigger as time goes on, and the only thing that can reduce its size is a reformat.
Some other tips:
Reduce the amount of space given to System Restore.
Check your Windows\SoftwareDistribution\Download and \DataStore directories. Windows Update keeps hotfixes here and sometimes doesn't delete them after they're installed. The DataStore.edb file keeps track of what you've pulled down from Windows Update (should be ~300 MB). Don't bother deleting it because it'll just come back when you run WU.
Check your pagefile size; it may not be necessary to have the windows-controlled amount if you have enough ram.
Get rid of the hibernation file if you don't hibernate (can place extra stress on a SSD): Run an elevated command prompt and type powercfg -hibernate off.
Run cleanmgr.exe and select "Clean up system files." Windows logs alone can take up a few gigs if they haven't been wiped in a while.