I need to transfer my OneDrive account from my former university to my new university. What tools are available to do this, or what is the process? I tried mover.io, but they charge $1/GB, and I have a few hundred GB of data.
Now you can use mover.io - a recently Microsoft acquired service built for exactly this, therefore it's secure, tightly integrated and approved by Micrososft
I recently used it to transfer 108 GB of files from one account to another. It skipped around 10 GB for having long path names, all of which were saved in a log available for 90 days, in order for me to recheck them and transfer in another shorter path in those 90 days.
or you can put all data in one folder and then share it to yourself (to another account) and then retake ownership
You can try Multcloud, it is an alternative to mover.io. It allows you to freely transfer files count 50GB/month. Since you have few hundred GB, you can migrate them separately in several months if you are not in a hurry. Or, you can order its monthly service (only $9.9 for 150GB/month) or Quarterly service (only $24.9 for 200GB/month). Guide for how to transfer files from one OneDrive account to another OneDrive account