To get started, visit takeout.google.com/settings/takeout
"You can export and download your data from the Google products you use, like your email, calendar, and photos. In a few easy steps, create an archive to keep for your records or use the data in another service."
Step 1: Choose what you want archived
Step 2: Customise format and delivery
Read Support and FAQ page: Download your data - Accounts Help
"You can export and download your data from the Google products you use, like your email, calendar, and photos. In a few easy steps, create an archive to keep for your records or use the data in another service."
Step 1: Choose what you want archived
Step 2: Customise format and delivery