UPDATE: 9/15/20, 12:17 PM

The problem with Google Drive should be resolved. We apologize for the inconvenience and thank you for your patience and continued support. Please rest assured that system reliability is a top priority at Google, and we are making continuous improvements to make our systems better.

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Google is reporting affected users are able to access Google Drive, but are seeing error messages, high latency, and/or other unexpected behavior.

From https://www.google.com/appsstatus#hl=en&v=status