How Do I Get My Photos Out of Google Photos Quickly?
The fastest realistic route out, and the two settings that save the most time.
Use Google Takeout and select only Google Photos. Leaving everything else ticked adds hours for data you do not want. Choose the largest zip size offered, because fewer, bigger files download faster and are easier to keep track of.
Google prepares the archive on its own schedule. A large library can take a day or more before the download links even appear, and the links expire, so download promptly when the email arrives.
Once it is down, the photos still have no dates in them. Takeout JSON Metadata Fixer puts them back in one pass so the library is actually usable, rather than thousands of files all stamped with today.