You just answered your question. Powering off and ejecting the SD/SIM tray (which already requires its own tiny little tool that you need carried with you), is more of a hassle than using a ubiquitous cable. Not to mention a wired connection is always going to be faster than the wireless methods.Why would anyone want to do that? It's a PC in it's own right. And if you need to put something on it's storage card just turn off the Lumia 2520 and eject the SD card.