To back up your Gmail messages, go to Google Takeout. Using my test Gmail account that held about 75,000 messages, I got a download from Google Takeout in about 2 hours. Once you've saved a copy ...

Walk test: We took each soft-sided carrier containing a 10-pound weight on a 15-minute walk around a neighborhood. Each was carried using the shoulder strap and held at the front of the body the ...