Storage Rules

Tents

You can only place a tent of a smaller size within another tent. Tents that are found violating this rules are subject to they and their contents being deleted without warning.

Shelters

You cannot vertically stack shelters, shelters found to be stacked in violation of this rule are subject to deletion without warning and players can be subject to penalties including temporary bans.

Persistence

Unless otherwise stated, persistence on storage items/shelters/tents/buried stashes sea chests etc is set to 14 days. 

You will need to erect a flagpole and raise the flag, to refresh persistence of your base, storage items and their inventory.