Samsung Galaxy S4 User Manual page 19

Important! Be sure to align the gold contact pins on the card with the
device's contact pins.
Note: MicroSD cards should be formatted within the Storage menu.
Using an older or slow microSD card can affect camera
performance, especially for video recording.
To remove the microSD Memory Card:
1. Remove the battery cover.
2. Firmly press the card into the slot and release it. The card
should pop partially out of the slot.
3. Remove the card from the slot.
4. Replace the battery cover.
Getting Started 12