1. How to get XP from the Storage?
You need to upgrade the Storage first by spending 100 Smurfberries in the Storage Shed.
2. How to get weekly Smurfberries from the Wonder Storage?
You can upgrade the Wonder Storage by purchasing the upgrade option for it.
3. Is it available for all areas?
Yes, it is. It works for both the Storage Shed and Wonder Storage across all areas. However, you will need to upgrade the storage in each area individually.
4. If I fail to collect the XP, will the timer reset?
No. The timer for the items will only restart once you have successfully collected the XP.
5. If I go offline, will the timer reset or start from the beginning?
The timer will pause and will not progress during offline gameplay. Once you come back online, the timer will sync and resume from exactly where it left off.
Here is an image below where you can see that the timers for the stored items have already started: