Purchased it for use on my Samsung Tab 2 as well as my Note 3.The msd card came with 3 possible formatting : NTFS / FAT /exFAT. The default is exFAT, and there seemed to be some comments saying that certain devices might not be able to read exFAT.Being the smart alec I am, i decided to format it to NTFS, assuming that my android devices will work with it. Tab2 was not able to read NTFS, and I had to reformat it back to FAT in order to get it work.Subsequently, I tried using those USB-SD card reader (those that looks like a tiny usb drive)and realised that apparently the SD card formatting is too new, and it simply will not register as 64GB, but can only read up to 32GB.Have not tried on Note 3 yet, but should work seeing that the technology is pretty on par.