It looks like there are multiple places to store documents. And, these are accessed differently. 

For example, I see there is a Documents tab, where I can create folders and subfolders. 

However, if I upload a document there, I cannot access it from email. 

Similarly, if I attach a document to a Lead Sheet, I cannot access it from email. 

Then there is the "Zoho Docs" button in email, which is a completely different set of folders??

Why don't we have just one Document repository accessible from everywhere in the CRM? 

Or am I missing something obvious?