Ubuntu – swapon: /dev/sdb1: swapon failed: Invalid argument

Best not to use /mnt, but create a new /mnt/data or just /data. You may want other mounts in /mnt and those would remove the data partitions (I have done that in testing a /mnt of something).

After you copy all your data folders like Music to the partition on your other drive. Unmount your temporary mount if it is just temporary.

NOTE: The mount point can be anywhere. If it's in your /home or /media folders it will show up under "Places". If it's directly off "/" or /mnt it will not. I prefer /mnt so I do not see it other than thru the links.

sudo mkdir /mnt/data
sudo chown $USER:$USER /mnt/data
sudo chmod -R a+rwX /mnt/data

Note: The big "X" will also not make files executable unless they were executable to begin with. find your UUID, entry below shows example with UUID, must be yours

sudo blkid

Edit fstab with your UUID, use ext4 or depending on format:

sudo -H gedit /etc/fstab

UUID=a55e6335-616f-4b10-9923-e963559f2b05 /mnt/data ext4 relatime 0 2

Verify entry is ok, if no errors it is, if manually mounted as above unmount first:

sudo mount -a

from home (cd ~ if not at home) so default location of link is in /home/$USER cannot have duplicate entries, so move current to temporary location, repeat for each folder you want to move.

mv Music oldMusic

Music is then also the folder in the partition mounted as /mnt/data

ln -s /mnt/data/Music

Or link all folders with one command:

for i in echo /mnt/data/*;do ln -s $i; done

You can delete oldMusic after you confirm everything is ok.

it then should be this with l as first char for link.

fred@Z170N:~$ ll
lrwxrwxrwx  1 fred fred     15 Jun 10  2017 Music -> /mnt/data/Music/