How to sign into Google Drive on a computer or phone, and what to do if you can't remember your login information

You can sign into Google Drive using the same username and password as Gmail, YouTube, and all other Google apps.
Android Police

Gmail: How to sign into your Google or Gmail account

Gmail, along with the entire Google Workspace suite, has apps for Android, iPhone, and tablets and remains accessible through its web app on your computer. However, logging in to your account can be a ...