They were probably a variant of the unofficial format known as an MP3 CD. Basically CDs which contain computer audio files. CD Audio discs as specified by the redbook standard do not even have a filesystem and don't contain files.

[–] user224@lemmy.sdf.org 3 points 9 months ago* (last edited 9 months ago) (1 children)

I am pretty sure they experienced some KDE Ingenuity.

Example:

You can see they can't be real files due to their total size:

Unfortunately, at least on Arch it seems a bit broken. The CD keeps spinning at low speed with audible random searches and the file transfer speed is abysmal. Copying out one 3.5MiB MP3 took it almost 2 minutes.

[–] Scoopta@programming.dev 1 points 9 months ago

Huh that's actually pretty nifty, I personally use nemo but tbh I haven't inserted a CD I don't think ever to look at what it does