Hi @MsKhal,
Welcome to the Community!
Until now, I have not heard of other users that have had storage issues with the professional package. You can always contact our growth team for more details about document storage with your package.
You can contact my colleagues from the growth team via Find Answers → I need help with my subscription.
Be aware that only Contract and Account owners can contact our growth team. In case you are not registered as such, please contact your colleagues in the role, or add this information in your account. You can find out how here.
Please let me know if there is anything else I can support you with.
I wish you a lovely afternoon.
Best,
Andrea