Comment 11 for bug 1764845

so found out a workaround. if you keep the session open manually by reading a file over and over you can reset the timer described here: https://gitlab.gnome.org/GNOME/gvfs/-/issues/360

Basically after keeping a session open on only a specific folder, there is a limit of 100 access things (reads, writes, etc.) and then the connection stales.

While the backup is running in the background, you have to manually browse the root of the google drive in nautilus every 5-10 minutes (file explorer) and reset that counter. You might get some errors like authentication failed but keep refreshing the root folder till you're able to browse files again. It finally completed my backup. This looks so easy to fix in the code tough and not sure why no one picked this up to fix this earlier.