usb3 slow on Imac 21,5 ?
my usb 3 lacie external harddrive is slow. It has a rate of about 100 mb/s in writing and reading (with Blackmagic Disk Speed test), when the specs mention a much faster speed (upo to 5 Gb/s). It is connected to an 21,5 Imac 10.9.2, 2,9 Ghz Intel Icore i5. Why is that?
iMac (21.5-inch, Late 2013), OS X Mavericks (10.9.2), Intel core i5 16 Go Ram