Best answer by Petrovic
-Click the “My Computer.” Locate the D drive and highlight it by clicking the icon for it once. Right click the icon while highlighted and at the bottom of the menu that appears, click “Properties.”
-Click the Disk Cleanup button in the disk properties window.
-Select the types of files you want to delete and click OK. This includes temporary files, log files, files in your recycle bin, and other unimportant files.
You can also Compress this drive to save disk space
You can also remove unused programs