i try to search at google about this problem sd card not detected, and its come lot's user have same problem, me too.....and i already read some of them, if i have to erase data in sd card, my data in old phone will be erase, can not use in Z5 premium, i think we all SD Card is to safe data, and use it to another device.. why other my phone do not have to erase or format only sony experia please be more reasonable to answer the problem