Try this Procedure :
1. Download testdisk: TestDisk - Partition Recovery and File Undelet
2. Repair the MBR on the SDCard. Follow these steps: TestDisk Step By Step - CGSecurit
After Steps 1 and 2. put the SD card back in your Phone
Ampere is a free app built for Android devices running Android 4.0.3 and up. WonderHowTo first brought the app to my attention last month, but I've
just now been able to test it. The goal is to help you troubleshoot suspect wall-warts and USB cables.
After installing the free app, launch it...
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