🔀 OneDrive → Google Shared Drive Copier

Microsoft (OneDrive):

1. Go to portal.azure.com → search “App registrations” → New registration.
2. Name: anything (e.g. od2gd). Supported account types: Personal Microsoft accounts only (or “Any Azure AD directory + personal” if you use a work account). Click Register.
3. On the app page → Authentication → Add a platform → Single-page application → Redirect URI: paste this exactly:
   
4. Copy the Application (client) ID from the app Overview page and paste it above.

Google (Drive / Shared Drive):

1. Go to console.cloud.google.com → create a project (any name) → APIs & Services → Library → enable Google Drive API.
2. APIs & Services → OAuth consent screen: choose External, fill app name + your email, and on the Test users step add the Google account you will copy with.
3. APIs & Services → Credentials → Create credentials → OAuth client ID → type Web application.
4. Under Authorized JavaScript origins add exactly:
   
5. Copy the Client ID and paste it above.