So my new Transcend 64 GB SDXC 300x card has only been used 3 times and recently I took about 26 photos in RAW quality and when I came home to download on computer and transfer to my USB drive all was well. The next day when I went to clear on camera by re formatting it it would say they were deleted and after takeing 64 very important shots and those photos being corrupted moments after taking I tried to delete and saw that the only photos that were still there were the ones I deleted from the other day, since then I have tried literally everything that me and the internet has on this problem, from formatting,deleting from camera and computer and all that goes with it. When I try to format on computer it says that "windows can't format at this time" so im just sitting here with brand new card that I can't use. Does anyone know how to fix this or is my card corrupted and I need new one? This is the 1st card Iv'e had that has done this to me my Sandisk 16GB still works perfcect. Thanks for all help or just saying your condolences.