IMHO these kind of large transfers of backups should be done on the Mendix end. I have created some support tickets for this. I am also in the process of migrating some environments and some are in the 100GB plus size. That is undoable to download and upload again.
And indeed I also have an example where the restore of a backup just fails in the V4 cloud. Mendix is looking in to this. So far the migration of the environments I am doing has not been a smooth process.
Regards,
Ronald
Hi Mike, AFAIK uploads are supported to 200GB. Maybe connect your pc to wired connection?