valuables

Teachers
If your hotel room's safety box is not big or strong enough for your valuables, or there's no safety box in your room,  and if you want to ask the hotel people to keep them for you, can you say like:

Could you keep my valuables?
Could you keep these valuables for me?
I would like you to keep my valuables for me.

Or what kind of expressions would you recommend?

Also, if there's no safety box to begin with and want to know where you should keep your valuables, can you ask like:

What should I do with my valuables?
Where could I keep my valuables?

Or, here too, what kind of expressions would you recommend?

Thank you.