I have a notebook that when im at home i use for work with a keyboard/mouse, a monitor (the monitor is HDMI) and some peripheals.
Well, i already have a cheap USB 2.0 powered (5v/1A) hub with 7 ports, in this hub i plug my keyboard, my mouse, a printer and the nobreak sensors (the power supply is only needed for heavier devices such external hard drives, so, i dont use it because the only things that draw power from this hub are the keyboard and mice and the USB 2.0 port can handle that). All of that is plugged into a USB 2.0 port on my notebook (it has two 2.0 ports and one 3.0 port, i let the USB 3.0 port free because sometimes i use for my external hard drive, its a 500GB unpowered 2.5 USB 3.0 hard disk).
My idea is to add two fixed external hard drives that will stay on my desk and when i come home i will plug into my notebook and use it. I choose for two 2TB 3.5 powered USB 3.0 hard drives, so, i will buy a far less cheap USB 3.0 adapter, but, unfortunally, this adapter has only four ports and i cant connect all my stuff plus the two hard drives. I think that even splitting the USB 3.0 speed (that is high), it will still get the full speed of the hard drives (i think that the drives cant pass 160MBPs each).
The disks have their independent power supply, so, i will not suck all the power of the USB 3.0 port.
So, my idea is to plug my current USB 2.0 hub in one of the ports of the USB 3.0 hub and use two others to plug the hard drives and the last usb 3.0 port to eventually plug my portable hard drive (unpowered).
The good thing is that the power supply that comes with the usb 2.0 port hub also works with the usb 3.0 hub, and if i need extra juice (something that i think i dont, because the only things actually drawing power are the keyboard/mice and eventually the 2.5 hard disk) i can use it.
My question is, how my notebook USB 3.0 port will handle it? It will work nicelly? The USB 3.0 port will nivelate all devices to 2.0 because of the second hub? And what about the speed, the USB 3.0 port speed is capable of handling 2 hard drive + some minor peripheals?
I also can plug the 2.0 hub into another USB 2.0 port on my notebook but, its another cord to plug every time that a get home and is one less usb port free on my notebook.
USB 3.0 HUB: 2 Powered USB 3.0 Disk + 1 Unpowered USB 3.0 Disk + 1 USB 2.0 HUB
USB 2.0 HUB: Mice + Keyboard + Printer + Nobreak Sensor (all 2.0) + Rarelly some device such a pen drive.
The USB 3.0 hub will be connected to the USB 3.0 port on my notebook.