Bash script for backing up selected google docs on a mounted google drive. Copies the files to new files with "BACKUP YYYY-MM-DD" added to the file name.

gdoc-backup.sh

#! /bin/bash

# Google Drive path
BASEDIR='/Users/xxxx/Google Drive/'

# Files to backup
FILES=(
	'Some Folder on Your Drive/Some Spreadsheet.gsheet'
	'Some Other Folder on Your Drive/Some Doc.gdoc'
)

# Date appended to the file to mark it as a backup.
DATE=$(date '+%Y-%m-%d')

# Loop through files to back them up.
for i in "${FILES[@]}"; do
	ORIGINALPATH="$BASEDIR$i"
	BAREPATH=${ORIGINALPATH%.*}
	EXTN=${ORIGINALPATH##$BAREPATH}
	BACKUPPATH="$BAREPATH BACKUP $DATE$EXTN"
	cp "$ORIGINALPATH" "$BACKUPPATH"
	echo "Backup Complete: $BACKUPPATH"
done

Maybe I'm missing something, but are you aware that .gsheet, .gdoc etc are just pointers to the files online? Look in those actual files and inspect the contents? I don't think this backup will help you much if Google Docs disappears/goes down.