is this product (cloud storage ) is safe on hackers..

boosteroid should also focus on the safety of their storage. may be some advanced security to protect thier consumers or costumer information and data....
I think it is safe from any hack activities. The devs do not let this project launched without being consider the possibility of hack or breach. Maybe they already created some remedies to that kind of problem because they know how much important the information and data to the users. Also cloud storage is very strict when it comes to their security.
Yes at some point you are right, they consider it before they launched this project. But we shall not forget that there is still a possibility to breach the system even if it is already established. There are still a lot of anonymous hackers out there that will trying to hack it. But I confidently sure that the devs will not let it happen.