Transfer complete.
Attachment upload is reenabled and should work again normally.
i only added about 250GB at the moment.
Let's see how long this will last.
At least i now know what i did wrong and why we had to do a desaster recovery :/
Attached the transfer-speeds (take into account, that this is lograithmic ^^')
Also the new backup is delivered and will be populated within the next few days. 2 geo-locaed backups seems a good idea for me, isn't it?`