annoying squeak

Hi lads, had the R27 since Friday and Ive noticed a very annoying squeak comming from the rear, sounds like its driver side rear. Does it constantly, my first thought was a problem with the springs however it makes this noise all the time and not just over big bumps.

Are there any common squeaks that the clios have as when I had my fiesta there was loads of squeaks and I knew how to solve them lol

Another question, do you have to put the key card in the holder for any reason or can you leave it in your pocket? Just wondered if it was supposed to be in the slot or not??
 
sounds like rear brakes.....

need a strip and clean etc

keycard keep in your pocket...thats the whole point of a "keyless" system