Tap the Home Button
> Apps 
> Settings 
> Storage > Unmount SD card.Push the microSD card inward until the card “clicks” and carefully slide the card out of the slot and replace the cover.
NOTE
The card should pop partially out of the slot.
WARNING!
Do not remove the microSD card without unmounting it first. Otherwise, it may damage the microSD card as well as your tablet, and the data stored on the microSD card may be corrupted.