Stellar Phoenix Compact PST is a professional application designed to extract Outlook attachments in a folder on the system hard disk, thus compressing the pst files.

This PST file compression software compacts the large PST file by compacting the PST objects and, also, by extracting the attachments to a separate folder on the local hard disk. This tool immensely helps in improving the performance of Outlook as the PST becomes much lighter in size.