Weird, my external hard drive has a usb 3.0. But the installation is really slow. I installed the packages by "installing all" does that affect the speed?Definitely not: 15 GB in 5 H is ~840KB/s, that's roughly half the theoretical speed of USB 1.0 (12 Mbit/s), get "something" USB 3.0, it shouldn't take more than a few minutes...