I've got a problem with the SD card of my Samsung Glaxy Note 2. It can no longer be detected on any device. It happened when a colleague of mine saved a huge file (about 900mb) into the SD card via a computer. I've even tried to slap it to a card reader and attach it to my laptop but to no avail. Does anyone know how to fix this problem? I can't even format the SD card since it says that no memory card is inserted. I wasn't even able to back up my files!