I have thousands of emails that I will be deleting from Outlook shortly. I am hoping to free some disk space after doing so. Will Outlook automatically release the memory used by emails after I delete them? To me it seems unlikely since Outlook stores its email in a single file. How can I get Outlook to release disk space after deleting a lot of email?


1 Answer 1


It's easy. Just open Account Settings, follow the Data Files tab, double-click any PST file you want to compact and click Compact Now button on the Outlook Data File dialog.

  • For Outlook 2003 users, you can find this under File > Data File Management > Settings > Compact Now Feb 20, 2014 at 16:58

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