Google Drive storage works perfectly under either of the following conditions:

1. You don't need more than 15GB space for STORAGE_DIR
2. You're using a folder on a Team Drive as STORAGE_DIR

This implementation uses Service Account to access your drive. Due to the limits of Google API, the owner of the files uploaded will be the service account, and according to Shared Folder policy, the files uploaded to shared folders will occupy the storage space of the owner, unless the shared folder is on a Team Drive.

Thus, if you're using a shared folder on your Personal Drive, there'll will be a 15GB storage limit due to the quota of service account; but if you're using a Team Drive, then you have nothing to worry about.

Append GoogleDrive

Required

Folder ID of STORAGE_DIR on your drive.

Enter the folder and find it in the URL, eg: https://drive.google.com/drive/u/1/folders/{FOLDER_ID}

Required

Path to the key file or the content of it.

GD_CREDENTIALS has higher priority than GOOGLE_APPLICATION_CREDENTIALS, if GD_CREDENTIALS is not set, then GOOGLE_APPLICATION_CREDENTIALS is used.

Tips: If you're using Firestore database and have already set GOOGLE_APPLICATION_CREDENTIALS, you don't need to do anything :)

1. Log into GCP Console
2. Enable Google Drive API (https://developers.google.com/drive/api/v3/enable-drive-api#enable_the_drive_api)
3. Create a service account and download key file (https://cloud.google.com/iam/docs/creating-managing-service-account-keys#iam-service-account-keys-create-console), you can reuse the service account of Firebase if you have one
4. Manually create a folder on your drive (Personal/Team)
5. Share the folder with the service account you created before, be sure to set proper permissions
6. Set all required envrionmental variables