For one thing, some less expensive Android phones have very limited internal storage. I have a very decent one who's achilles heel is the internal storage. The

For one thing, some less expensive Android phones have very limited internal storage. I have a very decent one who's achilles heel is the internal storage. The internal storage has been completely full pretty much since I got it, and any new app either has to be installable to the SD card (and most are, thankfully - except for anything Google makes for some reason) or be critical enough to displace an existing app.