Android Save to SD Card Setting and notes for the Market Upload setting

There is an option under the “Publishing options” area in your app's market "product details"，

the devil's name is "Copy Protection"。

Set it to “ON”， the app data surely won't be saved to sd card, even if you explicitly specify "android:installLocation="preferExternal"" in your manifest.

If you are trapped here with this like me, you'd be happy to read this.

Hope this helped.