Regardless of which version you choose, you benefit from several advantages over the built-in Windows copier:
The primary reason users upgrade to Pro is the ability to automate transfers. With the Free version, you must be at the computer to start the process. With Pro, you can write scripts (using CLI parameters) to schedule backups or transfers to run at specific times without human intervention. teracopy vs teracopy pro link
If you are a developer, IT pro, or power user, this is the "Pro" justification. Regardless of which version you choose, you benefit