I have nearly 600GB of photos in it and regularly do Takeouts every year or so. It takes a while and the format isn't that great (it's a ton of separate zip files), but it does eventually work.
Unless I am mis remembering, it generated about 200 or more ZIP files that you have to download one by one.
Unless I am mis remembering, it generated about 200 or more ZIP files that you have to download one by one.