Figured as the S5 is new and the Galaxy range has been OTG compatible, this might be of some use to somebody. As mentioned in the glass protector thread, I've used a couple of these from the seller (on my G2 . . . Don't tell anyone I am here in this forum checking out the S5 progress in time for my next upgrade ha ha) and they do the job as expected. I bought a Meenova before these too (which is still a cool device it must be said), but these were much cheaper than importing a Meenova to the UK was.
Has a basic option -
And a fancier option with USB, Micro USB, SD slot on one device -