Ok, this may be just me being stupid, but I wanted to ask just to make sure and I figure someone in here may know! I recently bought a 2013 iMac, all good there. But I obviously needed more storag, and so I plugged in my two USB3 hard drives. However, with only 4 USB ports on the iMac, and more than 4 things competeing for ports, I did the sensible thing of buying a USB3 hub. I researched and I *thought* i had bought a decent one. USB3, seemed to do everything I needed, and had external power so everything would be powered without issue. Seemed to work fine for a couple of weeks, but then during some tests I discovered an issue. I had one of my hard drives plugged into the hub, as I figured there was no reason not to at the time, and as it was the 'portable' external drive it allowed me to easily unplug it to take it with me without swivelling the mac around on the desk to get to the back. But then today when testing the speeds I noticed the following - Speed when plugged into USB hub - Write=30MB/s, Read=38MB/s Speed when plugged directly into iMac- Write=70MB/s, Read=80MB/s And this is when there is nothing else plugged into the hub, apart from that one HDD. As it is a USB3 hub, and USB transfer speeds are meant to be a lot higher than this hard drive can even attain... I cant see why this is being slowed down so much. SO here is the question... is this normal for USB hubs? have to admit I've never needed to use them before really. And if it isnt normal, would anyone recommend a decent USB hub, as I will be returning this one for a refund!! Thanks EDIT: I had the speeds the wrong way round. Silly me. Corrected now. The hub slows things down to USB2 speeds.