I am having problems with filters failing. Filtering from Inbox to personal folders on my machine. My .pst file is almost 2gig, and I'm afraid that's the problem... I suddenly started getting errors that either just say "cannot move to XYZ folder", or they say "destination folder can't be found or can't be opened by Outlook".

Can I set the MaxFileSize in the Registry to be larger (4gig?)? I looked and there are not MaxFileSize keys in the registry. What is the default out of the box?