Hello, Thank you for contacting Mozilla. I understand that you are having problems with using the SD card on your device. In order to better understand and investigate on the issue that you are encountering, please reply to this message with the following information: * What is the OS version found in the Device Information page? Please visit [http://mzl.la/Gzz6Kp this link] if you need help finding the Build ID of your phone. *Did you recently update your device to any other version other than the pre-loaded version? * Please provide the exact steps to reproduce the issue you are encountering. *What is the size of the SD card and have you tried formatting the card? Please be sure to include as much detail as possible, including any websites that may exhibit this issue, and any error messages that you may be receiving, exactly as they appear. This will ensure that we will have all the information needed to investigate into this. Thank you for your help and we look forward to hearing from you!