leo@leo-NUC7i7DNHE:~$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 1,8T 0 disk
└─sda1 8:1 0 1,8T 0 part /disk2
nvme0n1 259:0 0 477G 0 disk
├─nvme0n1p1 259:1 0 512M 0 part /boot/efi
├─nvme0n1p2 259:2 0 395,5G 0 part /
├─nvme0n1p3 259:3 0 40,5G 0 part /media/leo/rootMX18
└─nvme0n1p4 259:4 0 40,5G 0 part /media/leo/fee24aea-432e-4852-a750-b711ed43068b
Obviously I was wrong skipping proper mounting of the new partitions to the system and jumping to MX Linux installation on nvme0n1p3 (which I had to interrupt midway), so I will have to do it properly first and then go back to MX Linux installation.
More to follow soon.