Since quite a few people seem confused as to why their tablet is advertised as XX GiB storage, and then they only have ~200MiB for apps, I thought I would give a quick explanation. Most of these devices have around 512MiB of NAND, or flash, storage. This is used for the system, cache, recovery, boot, userdata, misc, and a couple of other partitions. The XX GiB reported in the specifications is usually some internal storage that is mounted to /nand or /sdcard. Even if mounted to /nand, this space is treated as your SD card by most applications. In fact, I've found that most apps ignore an external SD card completely. There are a few exceptions, but their usage of the external SD card is obvious, so I won't list any. Hopefully this can help clear up some misconceptions concerning space. Also, this should serve as a reminder to watch how many apps you install and to uninstall anything you don't use since space is most likely pretty tight on the mtd partition mounted to /data (userdata@mtd).