sbs standard 2011: What is eating my C hard drive space up?

Hello all,
I have a an sbs2011 standard user. Sharepoint is OFF. What is eating about 300 megs a day in space on my C drive? I looked for logs and saw nothing odd, no large files. Could it be WSUS? I am concerned and do not know what to do. What should I look for? We do not use Exchange...I know, could but do not. Exchange is running though, otherwise I do not know what would happen.
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dronethoughtAuthor Commented:
Oops, meant to say sbs2011 standard server!
Sorry. :)
Nick RhodeIT DirectorCommented:
I would install treesize.  This will scan the drives folders and point out the culprits (exchange/WSUS etc).  Once you clean those up then you can move them another drive if necessary but for right now this will help identify the culprit.

Cleanup WSUS:

Exchange Log Files Cleanup:  Run a full server backup

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