Do what I did! Great success on my Caminos keeping my stuff safe.
I took a 1m x 1m x 1m sized steel safe. It had a comb lock. I had a chain welded to the safe. And at the end of the chain I had a 80kg boat anchor welded to the chain. It worked! I had flashing red lights attached to the safe. Also a very loud alarm buzzer was on the safe as well. OMG I was covered!! No one would get my stuff!! Not on my Camino.
I was a real sight walking down the Camino with the safe, chain and anchor. And my pack...read below...
Only issue I had with that set up was I had the chain ran through one of the back pack straps...you know the ones that unsnap?? So someone one night merely unsnapped the pack and took it. I woke up with the safe, chain and anchor all sitting where I left them...in the middle of the floor where everyone tripped over them in the middle of the night. They were all cursing me all night long! Some couldn't even walk in the morning from tripping on my safe!
I forgot to put my valuables into the safe that night! Put my earthly valuables into my pack since I thought no one could run off with it. But they did. Yep they got me!
But not to be out smarted! Not I !! I put garlic and onions and rotten eggs into my back pack. Just incase someone stole it. That way I could follow the smell per say.
Yep, I found my pack...just out side on the street. Seems they didn't like my choice of smelly stuff. By the way, I filled the pack completely full of rotten eggs, rotten fish, old smelly socks, onions and garlic. Even put a dead rat in there for just in case. Even had my underwear that I wore for two weeks walking in...never washed. Boy did those smell good and rotten! That pack was full to the top with horrible smelling stuff!
After all of this, I just can't figure out why no one seems to like me on the Camino.....I don't make Camion friends.
My next trick to prevent people from stealing my hiking poles ....is to super glue them to the metal frame of the bunk bed. Yep, that will stop 'em from stealing my hiking poles. Once and for all. In fact,,, for ever with those poles.
Just joking. I do as everyone on here says...keep valuables close by. Even take to shower. All the rest of the stuff is stuff no one would take anyway.
Just exercise common sense and don't leave your PP, money or meds laying around.
Most important...enjoy the Camino your way.