Under my root file system in Ubuntu I have a directory called "Download". Unfortunately the physical hard disk where this directory is placed is now full. I mounted a new hard drive and formatted it with ext4 file system.
On this new hard drive I created a new directory called "Download" and moved all the content from the old "Download" directory to it. But now I wonder how I can make the Ubuntu system understand that the new "Download" directory is the directory to use.