Hi,
About your question:
Storage: Currently, OneDrive for Personal users have a storage limit of 100GB1. If you previously enabled camera uploads and doubled your storage to 30GB, your storage should be within the 100GB limit.
Storage after canceling your subscription: If you cancel your subscription, your storage will be affected. According to the latest policy, free users will be limited to 5GB2 of storage. As a result, if you cancel your subscription, you may lose the additional storage bonus, which will drop to 5GB.
Hope the information will help.