If you have a web hosting, basically all you do is working on your control panel interface. You can do this through two methods, either File Manager or FTP. FTP or file transfer protocol is a method to manage your files. Through those two methods, you will be able to download any file from your site into your computer. You can also upload files to the website, move them and edit them all at once. Basically, both of them are there to help you done your task quickly.
Pros and Cons of using FTP and File Manager
However, if both of them do the same thing, what makes them different?