APK MOD INFO
Name of Game: LEGO Harry Potter: Years 1-4
VERSION: 1.06.4.1082

Name of the cheat, mod, or hack (credits: wendgames):
-MOD MONEY
-EXTRAS UNLOCKED
-CHARACTERS UNLOCKED

LEGO Harry Potter: Years 1-4 MOD APK 1.06.4.1082 (Mod Money & All Unlocked)

Download the CACHE file/OBB file. They should be .zip or .rar files.
Extract the file to your sdcard.
Move the extracted folder to the location: /sdcard/Android/obb