This page is a copy of DTs page at https://distro.tube/articles/move-your-home-folder-to-second-drive.html
Make Reinstalling Faster By Having Home On A Second Drive
Note: You may want to drop into tty to perform the following to avoid any weird side effects from doing this within your graphical environment. Also, for this example we will assume that your partition is sdb1 (change this to the id of your drive!). Also, have a backup handy — just in case.
Mount the new partition to /tmp:
sudo mkdir /mnt/tmp sudo mount /dev/sdb1 /mnt/tmp
Copy your HOME content to the second drive:
sudo rsync -avx /home/ /mnt/tmp
Mount our new HOME partition:
sudo mount /dev/sdb1 /home
If all your data seems to be present on the second drive and new partition, you may delete your old /home directory. To do this, you must first unmount the new /home partition!
sudo umount /home #unmount the new home first!
Then you may delete the original /home:
rm -rf /home/*
Now let’s make your new /home permanent. Get the UUID so we can add it to your fstab:
Then edit the fstab:
sudo vim /etc/fstab #or nano if you prefer
Add this line at the end of the fstab:
UUID=<noted number from above> /home ext4 defaults 0 2
Now reboot and see if it works!