Did you ever have any luck with this? Having the same issue with a feature doc. Files are mostly Prores 422 @ 29.97fps. Calculated size for an hour long sequence is around 650gb. I am exporting to an empty 4tb drive. I am logged in as the administrator and it still gives me this error. I made sure all drives connected were set correctly for read/write permissions as well.
I know in the fall update thats due out any day now they are supposed to make major upgrades to the project manager. Does anyone have a way to solve this until then? Or at least have an idea when this update will be released? I have to ship a drive in the next few days to the colorist and I need to figure what route I need to take. Adobe really has me over a barrel on this one. Any input is GREATLY appreciated!
Cheers
Tony