We tried using a Cloud drive as a ‘shared drive’ for storing 2020 files but it resulted in too many Design file corruptions (probably due to a file synchronising while still open in 2020 Design).
I’ll be trying this again (Google Drive and Dropbox are more advanced now) but might use a timed synchronisation service to ensure that the files update on the cloud at the end of the day.
Otherwise most of my users take copies home on a flash drive.