I purchased the same, windows 7 could see it and said it was formatted, Ubuntu could not see it, my PVR could see it but not show a folder. Tried to re-format it with windows 7, it did that but Ubuntu still could not see it, reformatted again windows said problems, then could not read the card at all, all though it could see it. Eventually reformatted using win 7, then tried to copy a file to it (twice) twice failed. I think these cards have some type of program in the root directory as in windows they show a special icon, not just a generic removable drive icon. IT goes back to where i purchased it and i will be asking for my money back.