The users are “unlimited” the max upload is set to 8GB.
Although I might have missed a setting because it won’t allow higher then 512MB.
The partition where /tmp/ and the OS live has >24GB free.
If I upload a file to the default storage or a directly mounted disk there is no problem.
Only when I upload to a over ssh/samba I run into problems.
Other programs can upload to the same ssh/samba.