what good are Metal Storage, Crystal Storage, Deuterium Tank buildings on the moon

[Daplion]

what good are Metal Storage, Crystal Storage, Deuterium Tank buildings on the moon
No mines? just storage?
What purpose do they serve?

[Mastermuffin92]

If you get attacked, the enemy gets everything what is above of your storage
For example.

100.000 ress
100.000 storage
Enemy gets 50.000 (different With classes on ragnarok)

100.000 ress
1.000 storage
Enemy gets 99.500