Should I add a directory or a binder?

Directories and binders are different folder types in C8. 

Binders are represented by green clipboard icons. They only contain individual items: protocols, videos, diagrams, and more.

Directories are represented as blue folders in C8 Health. They contain subfolders.

If you want to store individual items, create a binder. If you want to create subfolders, create a directory.