When mpw is connected to my wireless network, it will not allow me to drag file onto the mpw drive. I get access denied…you do not have permission to… I connected to mpw via its wifi network-then connected mpw to my network as per instructions. I can see and open all the files on the drive, but can’t add any new ones. If I plug in using the provided usb cable i am able to drag and drop no problem. Help!!