I made simple game but it has 30mb.
How to resize build size properly?
I want to avoid changing texture’s size because lower quality.
and how much mb unity3d take basically? nothing with just camera build become 8~10 mb?
With many modern games, textures are the assets that take most of package space. You can check your app situation from Editor log after you have built the .apk
Easiest way to reduce file sizes of textures is to use compressed textures. Unfortunately with Android that is a bit complicated since ETC texture compression (which is supported in every Android device) doesn’t support alpha channel. And other compressed texture formats are device specific ones
http://docs.unity3d.com/Documentation/Manual/android-GettingStarted.html (ETC as Recommended Texture Compression)