I bought 2 of these - big mistake. Ended up having to return them both for refund. First unit was DOA dead power supply, the second unit suffered with with very slow transfer rates <6Mb/sec with USB2.0 Installing the HDD is relatively painless but getting the HDD centered so you fix the the HDD in the case with the supplied screws was problematical - the board inside the case is too deep and IDE HDD with the cable attached will not center over the holes in the unit's base. It is even worse using a SATA drive, consequently the HDD ends up lose inside a case which sits metal studs for feet - a recipe for disaster as the case moves around on any polished surface - bluTack will stop it flying across your desk.