I have a 2TB USB 3.0 HDD connected to my HTPC. I've transferred a bunch of files back and fourth between my drives and know that its read and write speed is 108MB/s. However, when downloading five, 11GB files from my FTP server at a combined speed of 47MB/s, the write load reaches 100%. Moreover, when I attempt to watch a video file from that drive, while downloading the aforementioned, it stutters and can't playback as the read load is also at 100%. The video file is only 45Mbps, that gives it an equivalent read speed of 5.6MB/s, well short of the 108MB/s it's capable of. If I stop the downloads, however, the video file plays back flawlessly and the read load is only 18%. CPU and RAM usage while doing all of the above is fine and nowhere near bottlenecking. It's obvious there's a HDD bottleneck here. but I don't understand what is causing it. Does anyone have any ideas or tests I can do to route out the problem? The drive is a Toshiba HDTB320EK3CA, 5400rpm, 16mb cache (I think, hard to find info). Any help would be greatly appreciated.