I'm looking to attach a hard drive to my router via ethernet (it doesnt have a usb port). All I want to be able to do is access files throughout my house without being tethered to my external hard drive on my desk and I only need, at most, 500gb of space. Anyone have suggestions for a cheap ($90-125) external hard drive that fits these requirements and is reliable (i've read a lot of nasty reviews on amazon)? Any help is greatly appreciated. Also, would it be possible to convert my current usb external hard drive to connect over ethernet (with some sort of ethernet-usb adapter) to my router?