Moving files from a corp account where I'm a contributor to a new business account

Hi Jennifer. 

Welcome to the Box Community, I'm happy to help!

Please be advised that you cannot transfer contents that you do not own in your corporate Box into another Box account, only folders owner are able to transfer ownership of contents they own into another account. For more information, please take a look at this article: Transferring Folder Ownership

If you need your new Business account to have access to the same contents you are collaborating on with your corp account, you can ask the owner of those collaborative folders to invite your other account to collaborate in those as well.

Hope this information helps! Thanks for posting and let us know how else we can help.

All the Best,