Hey @grafifontis,
I’ll see if I can dig an answer to this, are you specifically wanting to know capacity of asset manager (images/video etc). Because few other limiations that aren’t explicitly mentioned like pages, CMS items etc.
Theres a good list of the well know limitations here:
Ill see if I can find more on specific storage numbers, but It couldn’t be a real issue as there is always hosting / embed / script options 