Sony SGPT21 - Manual (Page 34)

Removing/Inserting a microSD Memory Card
Your tablet device is equipped with a microSD memory card slot. A microSD memory card is inserted into the
microSD memory card slot by default. When you replace a microSD memory card with a new one, follow the
procedure below.
To remove a microSD memory card
1. Make sure files are not being transferred and then turn off your tablet device.
2. Press the two buttons to open the bottom cover.
3. Remove the battery pack.
4. Locate the microSD memory card slot.
5. Push in the microSD memory card all the way and release.
The microSD memory card ejects.
6. Hold the microSD memory card by the both sides, and pull it out of the slot.