Follow the instruction to unmount SD card from the tablet PC below.
1. Go to 'Setting' on wallpaper.
2. Go to [General -> Storage -> SD card] and tap [Unmount SD card].
3. Read the notice on pop-up windows and tap [OK] button.
4. After unmounting SD card, you can check the message, SD card safe to remove, at the top of the screen. Then, the user can unplug SD card from the tablet PC.
(If you want to mount SD card, tap [Mount SD card])