There are two ways to use an SD card with your device. Step 2. Step 1. Once your SD card has been formatted as portable storage, you can move files between the SD card and your Android phone’s built-in storage. Insert the Micro SD card into the SD card adapter and ensure the SD card reader is connected to the computer. You can remove the SD card from the device and plug it into your computer or another device and transfer files, like videos, music, and photos, back and forth. In the past, Android has traditionally used all SD cards as portable storage. Insert the SD card adapter, with the Micro SD card inserted, into the SD card reader. How to Use a Micro SD Card on a Computer.