A Microsoft file hosting and synchronization service.
Hi, and welcome to Microsoft Q&A.
Copying shouldn't be too tedious if you have enough space on your hard drive for both copies.
My suggestion is to go to the OneDrive cloud icon on the taskbar > Settings > Account tab > +Add an account and add the other account there. Then, you can either copy or move files from one OneDrive folder to another. Ensure that all the files you want to copy or move are available on your computer and are displaying green OneDrive icons.
The following video mentions a business account, but it should work equally well for an education account: https://www.youtube.com/watch?v=iRQWD0rdRTw
I hope that would work for you.
Craig