As a guess I would suggest that you have nothing wrong, it's simply that the USB device is not low enough power to be driven by the N810. In host mode and with a valid USB storage device, the file manager will start automatically and you will see the device reported at the bottom of the list.

I know these card readers work that I posted some time back (see second post), They are multi readers and work with at least 16gb SDHC cards.

http://www.internettablettalk.com/fo...ht=dealextreme

I am still looking for a single SDHC card reader that will work (I've tried 5 different types so far with no sucess)