If you are having problems with your server running out of hdd space and can’t figure out why, chances are your databases are causing the problem.
Don’t jump in and start deleting files there is an easy solution!
When logged into your Server Management Studio right click on any database name.
Select properties, options and set the recovery model to simple then click ok. Now right click on that database again
Select tasks, shrink, files and set the file type to log. Then click ok.
Chances are you have just cleared out a couple of gigs worth of log data that has built up over the last few months/years.
Just be aware that the transaction log file that has been shrunk is used to back up the database but chances are you are already using some 3rd party hard drive image tool and this log isn’t really needed.
Anyway if you are concerned about the recovery models here is some light reading on SQL Server Recovery Models.