Does the epub reader foliate work for others?

[myswtest]

Maybe you should try the Flatpak version of Foliate.

However, maybe you should read this first:

Errors when saving documents in OpenSuse Leap 15.6

Update. Today, after around 2 weeks, the same things happened. The root was almost full again. During investigation it was found that a software called Foliate (supposedly an e-book reader) downloaded on my disk around 30 G of data in the last two weeks. I don’t know why would an e-book reader download and keep on the disk 30 G of data in two weeks. Any ideas?