Samsung GALAXY J3 EMERGE User Manual page 262

Mount a microSD Card
When you install an optional memory card, it is automatically mounted (connected to the device) and
prepared for use. However, should you unmount the card without removing it from the device, you need
to mount it before it can be accessed.
1. From home, tap Apps
2. Tap Storage.
3. Tap More options
4. Under Portable storage, tap your SD card, and then tap Mount.
System Settings
> Settings > Device maintenance
> Storage settings.
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