Okay kiddo, imagine you have a toy box and it's too full to keep all your toys in it. So, you decide to put some of your toys in another box and keep it under your bed. Now, you can easily access the toys in both boxes whenever you want to play with them.
Similarly, a file server is like a giant box that stores files of all kinds- documents, pictures, videos, music files, and more. It can hold a lot of files like a big toy box. These files are stored on a computer that's connected to a network, and other computers on the same network can access those files.
Think of it like sharing your toys with your siblings or friends. Just like they can come and take toys out of your second box when they want to play with them, other computers on the network can access files from the server.
This way, the file server makes it easy for people on the same network to share information and work together on projects. Instead of emailing files back and forth or using USB drives, everyone can access the files they need from the file server. It's like having a giant toy box that everyone can play with!