Does the 2nd storage tab ever naturally unlock, or can it only be unlocked by 250 diamonds?
The reason I ask is because it isn't clear;
"This storage tab is not yet available to you"
The wording would imply that the 2nd storage tab will eventually become available, but doesn't say when. The wording should be clearer, either it's diamond unlock only, or an indication of when it will unlock.
If it's diamond only I would get it, but I haven't so far because I would rather spend those diamonds elsewhere if I am close to unlocking it, since I don't know when that is I can't make a judgement as to justify the expenditure.