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.
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How to transfer ownership of a Google Drive folder or file

If you want to move your data to a different account, you can — although the process is a little complicated. If you want to move your data to a different account, you can — although the process is a ...