I'm reposting what I said in a couple previous security threads.
Like others have said, you are not going to stop a determined / experienced thief but you can make it easier for law enforcement to catch them.
On my garage, I put in a commercial steel entry door & frame with commercial grade lockset & deadbolt. Windows are 15 ft above grade and the overhead doors are insulated metal. If someone wants in, they can just ram the overhead doors. My cameras however, should catch the action.
Motion sensing lights make a good deterrent at night. Motion lights with built in camera are even better. A friend, who got robbed when away, after the incident, put up motion sensing lights with the built in cam. He found a few occasions, when checking the cards, of people setting off the light and running away. There are several brands out there, just go with the higher resolution cams.
I prefer the bird house or other covert type cameras. Reason is, a guy that I know who has a junk yard told me the culprits wear hoodies or ski mask and show up on cam but can't ID them. He has since removed all of his camera warning signs and has hidden his cams.
My neighbor is a retired State Trooper and told me they have a very good idea of who the local hooligans are. They just need enough evidence to tie them to the crime.
Set up a camera or two for photographing vehicles. A time stamped photo or video of someone in a hoodie may not be enough for probable cause but along with time stamped vehicle photos or video, they may have a better chance of bringing someone in for questioning. The more evidence the better.
We had a suspicious vehicle cruising the road last summer. Pulled clips of the vehicle from game cam and surveillance cam then neighbor distributed to State Police, Local Police & Sheriff. The vehicle had been reported before. With the photos, they were found and confronted by the Sheriff. They were from away and running scams in the area. Haven't seen them since.
Then you always have the big bad dog option.