For those having issues with
Google File Stream, this worked for me on Big Sur beta 2 and DriveFS Version: 40.0.8.0. Give it a try if you have sudo powers.
To get Google Drive File Stream running in Big Sur beta, run the following commands in a Terminal:
Bash:
sudo kextload "/Applications/Google Drive File Stream.app/Contents/MacOS/dfsfuse.kext"
1>/dev/null 2>/dev/null /Applications/Google\ Drive\ File\ Stream.app/Contents/MacOS/Google\ Drive\ File\ Stream &
Source:
https://github.com/slw07g/googledrive-patch