PI 7.1 to PO migration

Hello Experts,

I have read quite a few blogs about the migration tool and how to migrate from PI to PO but all these tools talk about the Dictionary objects migration.

I wanted to know that how does the ESR objects be moved from PI 7.1 to PO.

Currently we are using File transports in PI 7.1, if the transport of the objects can help to move from PI to PO, can we use File transports to move from PI to PO?

Or does it need to be CTS transports.

Please help.

Thanks,

Hetal