The following Google Apps Script tool allows you to quickly append new permissions to existing files within Google/Shared drive. This is quite a niche tool so it is anticipated you would already have a Google Sheet of file IDs/URLs, though there is the option to select an existing Drive folder of files and automatically bring them into this tool.
By inserting email addresses using a comma-and-space format you can optionally select to send a notification email to the new user(s).
You can continue to append further rows to the Google Sheet as existing ones will be skipped once the ‘Status’ column has automatically been marked as ‘Completed’. Alternatively you can clear the Sheet each time for a fresh start.
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| Quickly append new file permissions via a Google Sheet |
