Moving to new computer – How do I move Outlook Folders?

I am moving to a new computer and use a couple different emails including a Mac email, and a company exchange email.  I have saved emails into folders on my current system and when I brought up my new outlook - it quickly (okay, maybe not so quickly) downloaded my emails, but not my project folders.  My email system is pretty large and while I need to clean it up, I hesitate to do it before I figure out the best way to bring over my existing system.

Thank you for advice!