Like OS X Finder

It can operate on virtually any iOS file type by any means that is available on your device (decompress, pass them on to other apps or file sharing services, ...).

And, you can place these files anyplace in folders in a tree-like organization system, such as you find in the OS X Finder. Then, if you sync this file tree with, say, iCloud Drive or DropBox, you can then access these files in the actual OS X Finder, organized as this file tree (and giving you an automatic backup at the same time).

I really cant think of another function that one would need, once you have Notebooks. I especially like being able to change a font size just by pinching in the content of a file, allowing you to QUICKLY expand the file text to make it just the right size for reading, just to mention ONE feature.

Have-Used-App about Notebooks 8