Best PST Split - Version 4.0 I want to split my Outlook PST files? I am thinking its cause of oversized PST files? Yes you are right its cause of oversized PST files. Beautiful solution!!! It's worked on the first try. Well easiest way to resolve your heavy Personal Storage files with best PST split tool. This tool name is best PST split it's really best all over the split PST software. Microsoft office PST split software split all items of Outlook such as: inbox, contacts, calendars, inbox, journals, to do list, task, attachments, address book and emails etc split into smaller fragments. Microsoft PST split utility program support all Outlook Version like-97, 98, 2000, 2002, 2003, 2007, 2010 (32 bit) and Windows Version like- Win 7, Vista, CE, 2000, 2003, XP, ME, 98. You can carve you large PST files according to your requirements like: *Split PST by size*Split PST by year*Split PST by sender emails*Split PST by date*Split PST by folders/selected folders.