Hi. I have bought a micro SD with adapter. When i put it on slot , My laptop (VGN-AR71S) wants format but never finish format, and says error. When i use it with external card reader over usb plug, its works everythink. I formatted there but when i put it again to Sd slot,same problem. I have originaly Sony VAIO OS (Vista Home Premium). Thx for any advices and helps..