How do we transfer ALL data from a user's one drive after that user leaves the company. We keep running into a 20 GB size limitation and file count limitations, however we absolutely need to have a way of getting our data out of One Drive once it is in One Drive even though we are talking about hundreds of GB of data.
First I suggest you add the account to your OneDrive and let the sync happen automatically. If you still run into issues, open the file listed below and edit the MaxClientMBTransferredPerDay and MaxClientRequestsPerDay parameters to values which will work for you. You'll need to restart the OneDrive Sync client for the new values to take effect.