My phone works great until i put an adata 64 gig external card in the phone. Apps won't load black screen etc. I take the ex. card out and the phone works great. Any help would be greatly appreciated.
Welcome to Android Central! The SD card could be corrupt, defective, or counterfeit. Install SD Insight to see if the card is genuine or counterfeit. Counterfeit cards are programmed to report more storage than they actually have, and if you try saving more than the card can actually hold, then files can start getting corrupt.