Below the cameras is a super fast fingerprint scanner which can read a fingerprint in just 0.1 seconds. (androidheadlines.com)
Not too bad, but I have used faster fingerprint scanners. (pokde.net)
The Moto G5S Plus has a reasonably fast fingerprint scanner in the bezel below the screen, and a microSD slot in the SIM tray to let you add to the 32 GB of storage. (techradar.com)