Fabby, thank you for your message. I really appreciate your efforts.
‘mount’ output:
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
sys on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
dev on /dev type devtmpfs (rw,nosuid,relatime,size=4031736k,nr_inodes=1007934,mode=755,inode64)
run on /run type tmpfs (rw,nosuid,nodev,relatime,mode=755,inode64)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
/dev/sda1 on / type ext4 (rw,noatime)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,inode64)
cgroup2 on /sys/fs/cgroup type cgroup2 (rw,nosuid,nodev,noexec,relatime,nsdelegate,memory_recursiveprot)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
none on /sys/fs/bpf type bpf (rw,nosuid,nodev,noexec,relatime,mode=700)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=29,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=11679)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime,pagesize=2M)
mqueue on /dev/mqueue type mqueue (rw,nosuid,nodev,noexec,relatime)
debugfs on /sys/kernel/debug type debugfs (rw,nosuid,nodev,noexec,relatime)
tracefs on /sys/kernel/tracing type tracefs (rw,nosuid,nodev,noexec,relatime)
configfs on /sys/kernel/config type configfs (rw,nosuid,nodev,noexec,relatime)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,nosuid,nodev,noexec,relatime)
fusectl on /sys/fs/fuse/connections type fusectl (rw,nosuid,nodev,noexec,relatime)
tmpfs on /tmp type tmpfs (rw,noatime,inode64)
/var/lib/snapd/snaps/gnome-3-28-1804_161.snap on /var/lib/snapd/snap/gnome-3-28-1804/161 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/telegram-cli_34.snap on /var/lib/snapd/snap/telegram-cli/34 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/acrordrdc_28.snap on /var/lib/snapd/snap/acrordrdc/28 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/snapd_12704.snap on /var/lib/snapd/snap/snapd/12704 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/core18_2074.snap on /var/lib/snapd/snap/core18/2074 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/snapd_12398.snap on /var/lib/snapd/snap/snapd/12398 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/core_11420.snap on /var/lib/snapd/snap/core/11420 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/skype_181.snap on /var/lib/snapd/snap/skype/181 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/wine-platform-5-stable_16.snap on /var/lib/snapd/snap/wine-platform-5-stable/16 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-3-28-1804_145.snap on /var/lib/snapd/snap/gnome-3-28-1804/145 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/wine-platform-runtime_231.snap on /var/lib/snapd/snap/wine-platform-runtime/231 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/brave_123.snap on /var/lib/snapd/snap/brave/123 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/core18_2066.snap on /var/lib/snapd/snap/core18/2066 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/core_11316.snap on /var/lib/snapd/snap/core/11316 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/skype_177.snap on /var/lib/snapd/snap/skype/177 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/brave_124.snap on /var/lib/snapd/snap/brave/124 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/wine-platform-runtime_230.snap on /var/lib/snapd/snap/wine-platform-runtime/230 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gtk-common-themes_1515.snap on /var/lib/snapd/snap/gtk-common-themes/1515 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gtk-common-themes_1514.snap on /var/lib/snapd/snap/gtk-common-themes/1514 type squashfs (ro,nodev,relatime,x-gdu.hide)
tmpfs on /run/user/1000 type tmpfs (rw,nosuid,nodev,relatime,size=808392k,nr_inodes=202098,mode=700,uid=1000,gid=1000,inode64)
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)
portal on /run/user/1000/doc type fuse.portal (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)