Can you clarify what gets counted as 'storage'? Is this physically updated documents or does this include images, videos, etc.?

Notion is unlimited for me so I don't know exactly how much I have stored there, but looking at just a single database (I have over 1000 DBs) it is around 100GB worth of images alone. With your tier 3 we get 10 GB storage. I am guessing Weavernote might be for a different audience than Notion.