Ok, i will admit its like marmite, you either love it or hate it, i hated it, it actually pissed me of and i sold it, and then the owner threw it back at me, and it was so slow it couldn't run my USB hard drive, i tried my Fire wire one ..... but oops it doesn't have that port either. so i now have a SSD state drive that dosen't work, i erased the hard drive not the data on it accidentally, so now it is non recoverable, if it had Two USB's i could get it to work. The only time i will actually look at a MacBook Air again is when it has 2 USB's
You could use a USB hub....
And what do you mean it was slow it couldn't run your external that doesn't make any sense