Okay kiddo, have you ever played with some of your toys that are not in the same room as you? Like, maybe you wanted to play with a puzzle that was in your sister's room but you didn't want to get up from your room? Remote file system is like that.
So, the computer has something called a file system which is like a big storage room for all the files and things that you keep on it. Sometimes, you might need access to a file that is on a different computer or a server that is not in the same room or even in the same city as your computer. Just like you didn't want to leave your room to get the puzzle, sometimes you don't want to physically go to the other computer to get the file.
This is where remote file system comes in handy. It allows you to access a file that is on a different computer or server as if it was right there on your own computer. It's like having a magical toy robot that can fetch the puzzle from your sister's room and bring it to your room for you to play with. But instead of a toy robot, the computer uses software to connect to the other computer or server and retrieve the file for you.
With remote file system, you can do things like share files with your friends who live far away, work on a project with your classmates who are in a different city, or even access important documents and pictures that you saved on your home computer while you're away from home.