When the card is encrypted, the key used is stored somewhere in the phones hardware. How to decrypt SD card on android that encrypted using settings?. If you are unable to access your photos due to encryption of SD card, then here find out easy. After connecting sd card to laptop, I found out that the sd card has been encrypted and I need a key to decrypt the data on the sd card. I own a Samsung ON 7 phone and I was using a class 10 Sandisk memory card which was encrypted by the device in the lock screen and . 4 Enter your lock screen pin, pattern or password. 3 Tap Decrypt SD card to begin the process. 2 Scroll to the bottom and select Decrypt SD Card. How to Decrypt your microSD card: 1 Open the Settings app, and select Lock screen and Security. How To Decrypt An Encrypted Sd Cardl ->->->->