I have just received my second one of these. Whatever I plug in isn't recognised, the power adapter doesn't even power a 2.5" drive, basically it just doesn't work. The first one worked ok, I tried 2.5" and 3.5" IDE drives and all worked ok, but the thing fell apart on about the 3rd disk I tried. It still worked, but without the plastic casing was unlikely to last long so sent it for replacement (see above). I may give it one more go by replacing this one; wouldn't have bothered but for the other happy reviewers.