People seem a little confused about what the storehouse percentage actually means. To clarify:
50% means that the storehouse pays for 50% of your resource loss when you are in the red, refunds you 50% of all troops losses taken during an attack, and refunds some of your defensive troops (more the lower your land is).
It does not mean that 50% of what you produce is automatically added to the storehouse. The storehouse ONLY fills up with what you add to it yourself via the clan page.
50% means that the storehouse pays for 50% of your resource loss when you are in the red, refunds you 50% of all troops losses taken during an attack, and refunds some of your defensive troops (more the lower your land is).
It does not mean that 50% of what you produce is automatically added to the storehouse. The storehouse ONLY fills up with what you add to it yourself via the clan page.