if (HCD_IsDeviceConnected(&USB_OTG_Core))
{
do
{
status = USBH_MSC_Read10(&USB_OTG_Core, buff,sector,512 * count);
USBH_MSC_HandleBOTXfer(&USB_OTG_Core ,&USB_Host);
if (!HCD_IsDeviceConnected(&USB_OTG_Core))
{
break;
}
}
while (status == USBH_MSC_BUSY );
}