I have a Toshiba laptop. When I insert an SD card in the slot, the computer says I need to format the disc. When I follow the procedure to format it, it tries to then ends up telling me it cannot be done. My husband can format the card and then later on read its contents on his own laptop. So the problem is with my lap top. But at where exactly?? and mostly, how do I fix it?? Thanks for you help.