Originally Posted by paper13579
That is still a possibility but it only might work, not guaranteed
I successfully mounted and used an 250GB external HDD through OTG when I formatted it as FAT32, so, it should work with SD Cards too. Higher capacity SD Cards doesn't work out of the box in many phones because they come preformatted with proprietary file systems (exFAT/NTFS). From my tests, Xperia M can successfully mount volumes formatted in ext2/3/4 and FAT12/16/32 and the maximum size is limited only to the FS limit...