I'm a little confused about the difference between secure containers and locked down containers. Secures can hold 125 items and max 400 stones, right? But locked down containers can hold 125 items and unlimited weight? Are the items in the locked down containers also locked down/inaccessible?
Secure containers can only be accessed by those who you allow when you initially secure the container. (Friend/Owner/Co-Owner/Anyone) A locked down chest can be access by anyone that can reach it. This is why you keep locked down containers (which usually contain large amounts of resources) behind a table wall or similar type of barrier to block players from accessing them.