files and directories not belonging to user in .local/share/containers/ after running rootless podman

[mrdiago]

using arch linux with podman 4.5.1, linux 6.3.5
when I pull the image all files an directories in .local/share/containers belong to user running podman pull
when I run the image
some files or directories are created and not belong to user

podman run command

/usr/bin/podman run \ --cidfile=%t/%n.ctr-id \ --cgroups=no-conmon \ --rm \ --sdnotify=conmon \ --user 1000:1000 \ --detach \ --replace \ --label io.containers.autoupdate=registry \ --uidmap 1000:0:1 \ --uidmap 0:1:1000 \ --uidmap 1001:1001:64536 \ --network=slirp4netns:allow_host_loopback=true,cidr=10.0.2.0/24,port_handler=slirp4netns \ --dns=1.1.1.1 \ --name=navidrome \ --cap-add=NET_ADMIN \ --env PUID=1000 \ --env PGID=1000 \ --env TZ=Europe/Paris \ --publish 4533:4533 \ --volume /home/navidrome/data:/data \ --volume /media/opt2/mp3/fromflac:/music:ro docker.io/deluan/navidrome:latest

extract of find /home/navidrome ! -jser navidrome
e0d1f/diff/usr/share/X11/locale/nokhchi-1
11012050 4 -rw-r--r-- 1 689824 689824 341 févr. 4 22:02 /home/navidrome/.local/share/containers/storage/overlay/be8d520ade174d418abac328f66820597fbd8f2c172cc502d82bf01ad3
0e0d1f/diff/usr/share/X11/locale/nokhchi-1/XI18N_OBJS
11012051 4 -rw-r--r-- 1 689824 689824 908 févr. 4 22:02 /home/navidrome/.local/share/containers/storage/overlay/be8d520ade174d418abac328f66820597fbd8f2c172cc502d82bf01ad3
0e0d1f/diff/usr/share/X11/locale/nokhchi-1/XLC_LOCALE
11012049 0 -rw-r--r-- 1 689824 689824 0 févr. 4 22:02 /home/navidrome/.local/share/containers/storage/overlay/be8d520ade174d418abac328f66820597fbd8f2c172cc502d82bf01ad3
0e0d1f/diff/usr/share/X11/locale/nokhchi-1/Compose
11012107 4 drwxr-xr-x 2 689824 689824 4096 févr. 14 02:30 /home/navidrome/.local/share/containers/storage/overlay/be8d520ade174d418abac328f66820597fbd8f2c172cc502d82bf01ad3
0e0d1f/diff/usr/share/X11/locale/vi_VN.tcvn
11012115 4 -rw-r--r-- 1 689824 689824 342 févr. 4 22:02 /home/navidrome/.local/share/containers/storage/overlay/be8d520ade174d418abac328f66820597fbd8f2c172cc502d82bf01ad3
0e0d1f/diff/usr/share/X11/locale/vi_VN.tcvn/XI18N_OBJS
11012119 4 -rw-r--r-- 1 689824 689824 907 févr. 4 22:02 /home/navidrome/.local/share/containers/storage/overlay/be8d520ade174d418abac328f66820597fbd8f2c172cc502d82bf01ad3
0e0d1f/diff/usr/share/X11/locale/vi_VN.tcvn/XLC_LOCALE

[Luap99]

This is expected, podman uses ids from /etc/subuid and /etc/subgid. For example see https://www.redhat.com/sysadmin/rootless-podman-user-namespace-modes for an explanation on how it works.
You can use podman unshare to access these files.

[mrdiago]

thanks you for your replies
the uidmap allow to map one user inside to one user outside only, when several users manipules files inside the containers there is no way to make these files readable and writable by user outside the container ( for backup purpose )

but as you indicate : we can use podman unshare to launch a backup command