Samsung SM-J320A - Volume

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Remove a Memory Card
To prevent damage to information stored on the
memory card, unmount the card before removing it
from the device.
1. From a Home screen, swipe up to access Apps.
2. Tap Settings > Device maintenance > Storage.
3. Tap Moreoptions > Storage settings. 
4. Under Portable storage, tap your SD card, and then
tap Unmount.
5. Remove your memory card from the device.
Format a Memory Card
When formatting an SD card, you should back up
your music and photo files that are stored on the card
because formatting the SDcard deletes all the stored
data.
1. From a Home screen, swipe up to access Apps.
2. Tap Settings > Device maintenance > Storage.
3. Tap Moreoptions > Storage settings. 
4. Under Portable storage, tap your SD card, tap
Format, and then follow the prompts.
Settings 135