The amount of storage is always associated with the Team. If you are added as a member to another Team’s project, you are using their storage space.
With sciNote account you get one Team and 1 GB of free storage space. The projects that belong to a specific Team use the storage space which that Team has within sciNote. You can earn up to 10 GB of storage, if you invite more people to sciNote i.e. to your Team. You can also purchase Additional Storage plan for $9/month to upgrade your storage to 100 GB.