Samsung galaxy note 7 User Manual page 321

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 > Storage settings.
4. Tap SD card > Mount.
Settings System Settings
> Settings > Device maintenance .
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