@Vesa, .vwxp files can be located in a shared folder on the Vectorworks Cloud. This is a new feature that was launched with v2021 sp3. This works just like dropbox. Share a folder, save your .vwx file in that folder, then convert it to a project file. You should integrate your VCS with your finder so you can access the files directly from the finder windows. You should also use the VCS desktop app to see the status of download and uploading .vwxp files while working.
https://university.vectorworks.net/course/view.php?id=791
