Hi Blake
We have all our departments folders on google drive as well, but also use google drive to sync all these folders to the cloud and also for them to be used locally, you can use the google drive app you download and choose the folder below these department folders (locally) to backup and that would take them all onto google drive, also sync both ways as well
for google drive backup onto the internet for these, we use backupify
for local backups as well with these we use freefilesync (with versioning) and backup these onto a qnap drive
so we have multiple sources of backups, just incase teachers delete or anything else happens :)