We had a geezer try and pry our garage door last year.
Follow up results were a few things we never thought of (neighbour hood watch had a nice chap come round and talk with us).
Result was –
Dont carry bikes outside car.
A PIR outside front and back of garage that turns on a light INSIDE the garage or the house.
A separate PIR that activates outside the gargage front if someone gets really close.
Keyed locks on the bottom of our up and over door (original was only locked with a cable activated latch in the middle of the top of the door).
A battery powered alarm inside the garage (PIR activated).
Remove anthing from the garage that could be used to cut chains / locks.
Decent insurance. Fulfil the minimum requirement of the insurance (eg some policies locking bikes, some locking to anchors, others are different.
Jist of advise was – if they get in – they have all night – day to nosey / hack away / disassemble. Even if they get in and get detered they might come back.
Deter them from picking on you in the first place. There are easier targets.