|Usb 3.0 hardware works well with usb 2.0(backward compatible).|
the speed of my HHD will go to how many MB/s ?
It depends on the hard drive for e.g if the hard drive inside the enclosure is capable of 150mb/s u will not see more than 150mb/s even if usb 3.0 support up to 625mb/s.
I don't know necent but the card looks ok or if u doubt them try newegg.
We can not fight new wars with old weapons, let he who desires peace prepare for war - PROPHET.