4 Simple Ways to Reduce Outlook PST/OST File

TIP: Latest version of Deduper for Outlook allows to remove duplicate emails automatically with a single click.

Many Outlook users face the problem when their Outlook PST/OST file becomes too big. Below we offer 4 simple ways to reduce it.

1. Delete duplicates

Use Outlook built-in conversation clean up feature or use Deduper for Outlook for more control on duplicate detection and removal.

2. Save Outlook attachments to disk

Use Attachment2File for Outlook to save Outlook attachments and replace them with links to saved files on disk.

3. Back up old Outlook items and remove them for Outlook file

Use Syncsi for Outlook to save Outlook items to a portable data file, which you can view or save for archiving purposes.

4. Compact PST files

Select each PST file (usually called Outlook or Personal Folders). Right click on it and choose Data File Properties > Advanced > Compact Now.