Step 1. Launch Moborobo on Android
First of all, you should download and install Moborobo on your Android phone. Then, connect your Android phone to your PC. Once connected, you will get an interface like the picture below and you should go to the top menu to click Toolbox > Space cleaner.
Step 2. Start to clear APK files on Android
After you choose "Space cleanup" option, you will be popped up with the interface like below. You can tick off the files you want to clear and hit on the "Clean up" button.
Note: If here is no APK files are displayed, you can rescan your Android phone by clicking on "Scan again" button.
Step 1. Select the files you want to clean up
Get the Moborobo launched just like the operations above and connect your Android phone. Hit on "ToolBox" from the top and choose "Large files cleanup" option from the pop-up window.
Step 2. Start to clean up junk files from Android
Select all the files you want to clean up from your Android phone and click the "Clean Up" option from the bottom right corner. Similarly, if the junk files are not detected, please click on "Scan again" to have them scanned again.
Done! That's all the process to use Moborobo to scan the whole storage of your Android phone and clear useless APK files and junk files to speed up your Android device.