I recently had to migrate ~1TB out of Google Photos into my self-hosted NAS (Synology) and thought of documenting the many hurddles I went through in case it benefits someone else. There are a few ways to go about exporting photos from Google Photos. Not many that work for TB-data. The most reliable way is using Google Takeout to export everything. It will generate a set of files (50GB max) that you can download.