Subluxation: Partial dislocation of a joint. A complete dislocation is a luxation.
The largest number of items per content database that has been tested on SharePoint Server 2013 is 60 million items, including documents and list items. If you plan to store more than 60 million items in SharePoint Server 2013, you must deploy multiple content databases.
For #1: The maximum library limit is 30,000,000 documents. The maximum practical limit for a single folder is 2000 files. Sharepoint does not scale well beyond 1000 files per folder. For #2: There's no practical limit for the number of subfolders. Your folder structure will become unmanageable well before you reach the limit. The complete URL for the file or folder cannot be longer than 260 characters.