How To Install Apps Onto Your SD Card As Default

1. Enable USB Debugging

 First, you’ll need to enable USB debugging on your Android device. Open the Settings screen, tap      Applications, and select Development.

Tap the USB Debugging checkbox to enable it. This will enable debug mode, allowing you to change the settings on your Android device from your computer.

2. Install the Android SDK

You’ll need to download and install Google’s Android SDK on your computer. If you don’t already have Oracle’s Java JDK installed on your computer, you’ll have to download and install it before installing the Android SDK.

3. Using ADB

Open a Windows Explorer window and navigate to the android-sdk\platform-tools folder. On Windows, you’ll find this folder at C:\Program Files (x86)\Android\android-sdk\platform-tools by default. Check C:\Program Files\Android\android-sdk\platform-tools if you’re using a 32-bit version of Windows.

Windows
The start as 'shift+right-click' anywhere inside the folder and choose [Open Command Window Here]
 
    Mac
   - right-click the folder called "platform-tools" and choose [New Terminal At Folder]

4.  Enter in the following

For Windows :
       adb devices
       adb shell pm set-install-location 2
       adb shell pm get-install-location

For Mac : (note - there is a period before the slashes)
       ./adb devices
       ./adb shell pm set-install-location 2
       ./adb shell pm get-install-location


5. Check if you did it right

   - if you did it right, the last output should say: 2 [external]

 If you did it right, CONGRATS! Your phone will now install your apps to your SD Card by              default! Have fun now!