Windows Server: What software is available to report directory size

I've had success with Sysinternals Process Explorer. With this, you can search to find what process(es) have a file open, and you can use it to close the handle(s) if you want. Of course, it is safer to close the whole process. Exercise caution and judgement.

To find a specific file, use the menu option Find->Find Handle or DLL... Type in part of the path to the file. The list of processes will appear below.

If you prefer command line, Sysinternals suite includes command line tool Handle, that lists open handles.

Examples

• c:\Program Files\SysinternalsSuite>handle.exe |findstr /i "e:\" (finds all files opened from drive e:\"
• c:\Program Files\SysinternalsSuite>handle.exe |findstr /i "file-or-path-in-question"

Are you looking at file size, or file size on disk? Even a file with one character has to take up a block (normally 4k), and this can add up with lots of small files.

Do you have hidden files enabled? You pagefile is probably several GB, if you're not taking that into account.

WinDirStat shows you how much space each folder takes up, give that a try.