One of the new features of windows 7 is to expand readyboost from usb pendrives to other storage media. I have select the "Dedicate this device to readyboost" with the left sd socket (4gb sdhc card, sandisk extreme III). It seems that performance is improved, but every time I boot, the system take some time in order to create the readyboost file on the sd card. Anyone have a similiar experience, or knows how can I do in order to leave the file on the sd card and not re-create it every time? Regards, Alejandro.