Comment by mceachen

Try fetching only your photos in one archive, your Gmail in a separate archive, and then everything else in a third.

If you have "too many" Google photos and that archive fails, create albums for every year, and only download a year/album at a time. It's a huge PITA, but at least you'll get your stuff back. (Kinda: depending on how you uploaded your photos, the metadata may come back truncated or altered).