This details how to properly format the HDD in a way that the 360 will recognize, but with a PC(since your 360 isn't recognizing it): http://www.wikihow.com/Format-a-Hard...-With-Xbox-360

This explains how to format it while hooked up to the 360, but isn't applicable right now: http://support.xbox.com/en-US/xbox-3...sories/storage

This link will tell you how to transfer data with the transfer kit: http://support.xbox.com/en-US/xbox-3...transfer-cable