lsblk

NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
loop0    7:0    0     2G  1 loop /rofs
loop1    7:1    0  29.9M  1 loop /snap/snapd/8542
loop2    7:2    0    55M  1 loop /snap/core18/1880
loop3    7:3    0 255.6M  1 loop /snap/gnome-3-34-1804/36
loop4    7:4    0  62.1M  1 loop /snap/gtk-common-themes/1506
loop5    7:5    0  49.8M  1 loop /snap/snap-store/467
sda      8:0    1  14.6G  0 disk
├─sda1   8:1    1   2.6G  0 part /cdrom
├─sda2   8:2    1   3.9M  0 part
└─sda3   8:3    1    12G  0 part /var/crash