If you wish to change the SD card on the Motorola Droid 4, you will need to remove the back cover to insert or remove it. Here’s how.
1. Power the phone off.
2. Locate the back cover eject hole on the top rear of the device. Use a paper clip or the eject tool included with your Droid 4 to gently push the button.
3. While still pushing the button, slide the back cover off in a downward motion.
4. Lift the flap that says “Lift to access Micro SIM”.
5. The SD card slot is located in the silver slot on the right. Insert or remove the card as desired. When inserting the card, ensure that the card is secured and the gold contacts should face down.
You have successfully completed inserting or removing the SD card on the Motorola Droid 4.