and wait for the file to be compacted. You can return to the Mailbox Cleanup tool to recheck the size of the PST (Figure J). Check out this article I found on TechRepublic.

Following that, you need to choose a location where you want to save the file. Now, check the size of the new file and compare it with the old one. While testing, a 15.1 KB file became 11.9 KB ...