I’m responsible for backups on our home network. I noticed that my wife’s Outlook.pst file was over 1 Gb in size. I recommended that she buy Sperry Software’s Strip Attachments (I use it and like it). She bought it and I installed and ran it.
It created 4,585 files from the attachments and images in her Inbox and Sent Items. It reduced the size of her Outlook.pst file to 590 Mb.