I am a Google Workspace/formerly GSuite user, configuring rclone to push backups to the Google Drive storage quota of a given user account within said workspace.
Following the instructions provided at Google drive ,
I've set up the Google Workspace domain on Google Cloud (Google Developer Console), created a project with a service account, provisioned a key (service_account_file), and granted access to the workspace account's Google Drive (client_id, client_secret). On testing, rclone is successfully able to connect. Hooray!
My question has to do with potential monetary cost in terms of Google Cloud. While the rclone documentation happily (and helpfully!) provides these instructions, the Google Cloud interface displays ominous notifications regarding the lack of a billing account associated with my project, free tier quotas for API calls (of magnitudes greater than I ever expect to use in this capacity), prompts to sign up for a free 90-day trial offering credit for Google Cloud services, and so on.
Given that my Google Cloud project has no associated billing account and that rclone is successfully backing up to Google Drive with my custom client_id, am I safe in assuming that at least as things stand today, internal API calls from a Google Cloud project to Google Drive are a free service and my new backup solution isn't going to rack up a bunch of unexpected Google Cloud charges?