If it is still needed to transfer more than 750GB/24h to a single account, there might still be one possible strategy left for GSuite users.
The target account needs to be an administrator account, so it has the “Transfer ownership” option.
Now, if the need is to upload 75TB/24h, 100 temporary “transfer accounts” are needed.
Each account will still only be able to upload 750GB/24h - but when the transfers are done, the ownership of the uploaded files can be transferred to the administrator account and the temporary accounts can be deleted again.
Sign in to your Google Admin console.
Sign in using an administrator account.
From the Admin console dashboard, go to App > G Suite > Drive and Docs.
Click Transfer ownership.
Note: You need the Drive service privilege and the Data Transfer privileges to see this option.
In the From field, enter the current owner’s username and select their domain.
In the To field, enter the new owner’s username and select their domain.
Click Transfer Files.