Notes on how to configure SD card usage in Android emulator.
In Eclipse, go to [Window] → [Android Virtual Device Manager] → [New] or [Edit] to open the emulator settings screen, specify the size you want to use in the SD Card field, and click [OK].
[Reference]
・Android入門【第5回:SDカードから画像を読み込む】(ついでにGridViewで表示) | Android Techfirm Lab
That’s all from the Gemba.