Linux for Human Beings.
Ubuntu is a popular Linux operating system for PC / mobile devices, etc.
Developed by Canonical & based on Debian (another older Linux OS) which is known for it's rock solid stability.
Ubuntu is trusted everywhere computing by professionals and common users alike.
What is the Loop Device disk with snapd/snaps/gnome-* is this part of an upgrade process?
Snap uses loop devices to "mount" apps. You can see a lot more by running "lsblk". But occasionally snap bugs and shows loop devices in Files or Disks.
Is it anything to worry about or just ignore it?