By way of an overview in case you're not too computer-savvy: Normal hard drives like the one most likely fitted to your laptop contain spinning platters that contain the data you store. By virtue of their need to spin they include a motor that makes noise, usually fairly high-pitched because the drive spins very quickly, usually at either 5400, 7200 or in some cases 10000rpm. Solid State Drives (SSDs) by comparison have no moving parts at all, consequently they're entirely silent. That's a great benefit to them but their primary benefit is performance. While a normal drive relies on a mechanical seeker head moving to the correct loc

There's a little more to it than that, they can claim up to £50 in 'legal fees', but yes, that's more or less it. And the beauty of it is, even if they win (which is in no way a certainty), they lose. And just so that you're aware, in the whole of 2014, APCOA took the grand total of 7 (seven) cases to court (I don't know how many of those they won/lost) and you can bet your life that there were a lot more than 7 non payers