PSTCompress

Developer's DescriptionBy Obsidian Tower SoftwareCompress your Personal folders in Microsoft Outlook to make it run more efficiently.PSTCompress is easy to use. PSTCompress automatically probes and finds PST files that need to be compacted. PSTCompress can compress attachments as Zip files to recover even more space. You can also replace your attachments with a links to external files to reduce the PST file size by up to 95%. PSTCompress compacts PST files to reduce disk space and increasing performance.