I have the cheapest of cable locks. It's a $7 Wally World cable lock. Definitely theft deterrent not theft proof. Its very clumsy to use and the combination lock is quite fiddly. I thought I'd ask Santa for something better. I'd like something compact and was thinking of one of the folding locks I see. Are there any that can be clamped to the frame without messing up the fold?

What do you use?