PST size limit
Theoretically there is no size limit to Outlook PST file, but in actuality there is. Some say the limit is 2 Gig and others say the limit is 20 gigs.
When the PST file gets too big, it can cause problems such as slowness, lockups and other issues. It is a good idea to either clean out the pst file to make it smaller or create another PST file.
To create another PST file, click here.
How to repair a damaged PST file, click here.
How to open an existing PST file, click here.
How to rename a PST file, click here.