I finally bought a USB 3 handy drive, hoping to take advantage of the speed of the USB 3 ports of my laptop (Dell Inspiron 15R 5520).
The USB port is USB3 (blue inside). The Handy drive is a strontium USB 3.
Unfortunately, the transfer speeds are no different from USB2 speeds. On a folder with multiple small files, the average speed was a paltry 6-700KB/s. On a single large file, transfer speed is 15MBps.
I checked the Device manager and the USB root/advanced tab tells me that the current speed is "High speed". I re-installed the USB3 driver just in case, but it still lists "high speed".
This is a major let down because having fast USB3 ports was a key factor on choosing this computer.
Is there a way to enable super speed or did I just get screwed and need to live with 4 "USB3 ports" which perform no different from USB2 ports.