A special slot for inserting a memory card. Memory cards allow you to expand the phone's built-in memory (or in the past these slots have been used to add some missing features such as Wi-Fi ...
The SanDisk 128GB Class 10 microSDXC Memory Card is based on the UHS-I interface and offers transfer speeds of up to 100 Mbps. It allows you to transfer up to 1,200 photos in just 60 seconds.