john wrote:

If I created a new data where would the contacts reside? I guess in
old data file

They can be wherever he wants them, either the new or the old PST. The
default Contactsw folder will be in whatever PST he makes his delivery
location.

My friend has a 4.5 gig pst file
his categories in contacts are acting up, thinking maybe a new pst
would fix this, or doing scanpst?

Can't hurt.
--
Brian Tillman [MVP-Outlook]