A:
To my knowledge This micro SD card should work with any recent phones. I'm not sure about Galaxy J7 . Usually unlocked phones work well. I'm using Vivo phone which Best buy have it takes my micro SD card and stores well. I make archive later in hard drive. Or into computer. Sometimes it won't take all videos... So I add few at a time.mainly J7 phone specifically have to tell if it has capacity to add 128GB micro SD card. .