Its capacity is limited, but the larger the storage capacity, the more room for maneuver throughout the game.
The maximum capacity of the storage has changed over the years. In September 2022 it has changed again. Until that date the maximum capacity stood at 700, although there are some tricks to, with that base figure, reach 800, and even more.
Now the maximum capacity is 800 (September 2023), and can go up to 1000 (even a little more with special actions).
Check out the other tricks about the storage.