I see, thank you.
I guess I had been using fat32 on small USB drives by default for all these
years (i.e. without wondering what other options were available, because my
needs mostly involved transfers from GNU/Linux to proprietary systems), so
when I decided to use a former live system drive as a standard file transfer
tool I was reminded of the secure-by-default nature of GNU/Linux, as
mentioned by amenex.
Indeed the default behavior of GNOME Disks seems to be to set the owner as
root:root for ext4 file systems. I shall try to remember that when I switch
to ext4 for my /home directory backup.
I just found out that a few apps allow users to access ext4 content from a
wellknown proprietary OS, in case I decide to completely ditch fat/ntfs file
systems.
