I have a new 13" MacBook Air and found the data transfer speeds to external USB 3 devices to be underwhelming. I ran Blackmagic Disk Speed Test and the results speak for themselves. My 16GB USB 3 flash drive managed a paltry 16 MB/s write speed and a 66 MB/s read speed (Thumbnail attached.) A USB 3 1 TB WD Elements fared slightly better with both read and write speeds averaging at around 65 MB/s. Could there be a hardware/ software problem with my computer or one of the drives? FYI, my internal drive has 400 MB/s read and 450 MB/s write speeds. Is this normal? And if not then can you guys think of a fix?