How to remove the "xxx MB Volume" from my OS with anbox uninstalled?

[Pineconium]

I just uninstalled Anbox but there's still a weird volume on my hard drive called "326 MB Volume" that's full. Anbox made it since it contains a file called android.img and some other Android files. I tried uninstalling it via the terminal using sudo snap remove anbox but it randomly made another unrecognised drive called "392 MB Volume" and didn't get rid of the 326 MB one,

I can't delete ANYTHING within these MB Volumes, even with root. If you're wondering what distro I am using, its Linux Mint.