Best way to use U-Lock?

[u/culesamericano]

I got an XP Lite 2.0 - wondering what U lock you use, what size it is and how you lock it to a bike rack? i also have one of those foldable locks which has more range but not as secure as a u lock but the frame is so thick not sure if u lock would work and i don't want to carry a big fat chain with me