Samsung Galaxy Tab S4 User Manual page 122

Mount a memory 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 Settings, tap Device maintenance >
Storage.
2. Tap More options > Storage settings.
3. Under Portable storage, tap your SD card, and
then tap Mount.
Settings
Remove a memory card
Warning: To prevent damage to information stored
on the memory card, unmount the card before
removing it from the device.
1. From Settings, tap Device maintenance >
Storage.
2. Tap More options > Storage settings.
3. Under Portable storage, tap your SD card, and
then tap Unmount.
4. Remove your memory card from the device.
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