I bought Western Digital WDG1NC5000N from Circuit City but returned it the very next day. These are the reasons...1. This product will work ONLY through a router. I confirmed this with WD customer support also. Router should allocate IP then only your computer will recognize this hard drive. This means that typically you cannot carry this to your office and take backup from there.2. Very very slow data transfer. I started copying 18GB before going to sleep, by next day morning (after approx 7 hrs) it copied only 7GB.Even their customer support person told me that this drive will be very slow since it is connected through router and not directly with your computer. I must admit, greated use of this drive is that you can access your data through network.Overall, this drive will be very useful for people who want to access data through network (monthly fee may apply) but i dont suggest this for a normal home-office user. Now you decide..