I have an S7 Edge. If the cards in your phone, just plug the cable you got with the phone in to the PC USB. I've also got one of these, but you don't need it.
Just plug it straight into the PC with the cable you use to charge it.
US or UK?
I just bought this USB/MSD:SD combo which I hope will do the trick. Due to a pricing error it cost me £1 at Tescos.