Most MicroSD cards are packaged with an SD card adapter. It's easy to insert the MicroSD card into the adapter, and then plug the combination into a standard USB card reader or an SD slot in your computer.
Alternatively, leave the MicroSD card installed in the M10, and use the USB cable included with the recorder to link the M10 to computer.
The MicroSD slot in the M10 is different than the MicroSD slot in a cell phone. Push the MicroSD card into the spring-loaded slot in the M10 to insert it. Push again to unlock the card. The spring in the slot will push the card out to the point where you can grab it.
MicroSD cards cost about $10 for 4GB, $20 for 8GB, and $50 for 16GB. I'd look for a card that has class 6 speed and a lifetime warranty. You don't need class 6 speed for audio recording, but it does transfer files faster, and you may wish to use the card in a video recorder sometime.
Flintstone