Some of the most basic features:

1. Favorites/Starred folders. When you have a large directory structure you don't want to navigate manually each time with 20 clicks, add a star or favorite option

2. After you navigate to a folder deep down and then you use the search function, if you clear the search it then resets you back to the root of the drive, very annoying.

3. Teammates that have files shared cannot search them, impossible to work in a team without this