I have a problem exporting my project to another disk, this is what happens:
I needed to move the project from the windows partition of my Mac to the Mac partition, in order to be able to continue my edit under MacOS, my sequences include a series of After Effects compositions of footage that has been stabilized in warp stabilizer using the option "replace with AE composition" from the timeline.
Using the project manager I started my backup operation, with these options:
Source: all sequences selected
Resulting Project: Collect files and copy to new location
Include Audio conform files
Destination: a folder in the Mac partition
The resulting project had a message popping up saying that AE rpject file is missing (it was, I had to manually copy and paste it from ithe win partition to the mac) and once copied obviously AE couldn't find the source video clips of its compositions, so I had to manually re-link them all (quite difficult job to do among almost two years of footage).