Vielen Dank für die Antwort.
wolfgang@wolfgang-MS-7A38:~$ mount
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
udev on /dev type devtmpfs (rw,nosuid,noexec,relatime,size=3735508k,nr_inodes=933877,mode=755,inode64)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,nodev,noexec,relatime,size=760132k,mode=755,inode64)
/dev/sda2 on / type ext4 (rw,relatime,errors=remount-ro)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,inode64)
tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k,inode64)
tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755,inode64)
cgroup2 on /sys/fs/cgroup/unified type cgroup2 (rw,nosuid,nodev,noexec,relatime,nsdelegate)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,name=systemd)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime)
none on /sys/fs/bpf type bpf (rw,nosuid,nodev,noexec,relatime,mode=700)
cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)
cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)
cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls,net_prio)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
cgroup on /sys/fs/cgroup/rdma type cgroup (rw,nosuid,nodev,noexec,relatime,rdma)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=28,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=21705)
debugfs on /sys/kernel/debug type debugfs (rw,nosuid,nodev,noexec,relatime)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime,pagesize=2M)
mqueue on /dev/mqueue type mqueue (rw,nosuid,nodev,noexec,relatime)
tracefs on /sys/kernel/tracing type tracefs (rw,nosuid,nodev,noexec,relatime)
/var/lib/snapd/snaps/chromium_1708.snap on /snap/chromium/1708 type squashfs (ro,nodev,relatime,x-gdu.hide)
fusectl on /sys/fs/fuse/connections type fusectl (rw,nosuid,nodev,noexec,relatime)
configfs on /sys/kernel/config type configfs (rw,nosuid,nodev,noexec,relatime)
/var/lib/snapd/snaps/chromium_1732.snap on /snap/chromium/1732 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/core20_1081.snap on /snap/core20/1081 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-3-34-1804_66.snap on /snap/gnome-3-34-1804/66 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/core18_2128.snap on /snap/core18/2128 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/core18_2074.snap on /snap/core18/2074 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-3-34-1804_72.snap on /snap/gnome-3-34-1804/72 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/nmap_2499.snap on /snap/nmap/2499 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/nmap_2536.snap on /snap/nmap/2536 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/libreoffice_227.snap on /snap/libreoffice/227 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/snap-store_547.snap on /snap/snap-store/547 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gtk-common-themes_1514.snap on /snap/gtk-common-themes/1514 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-3-38-2004_70.snap on /snap/gnome-3-38-2004/70 type squashfs (ro,nodev,relatime,x-gdu.hide)
/dev/sda1 on /boot/efi type vfat (rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
/var/lib/snapd/snaps/snapd_12704.snap on /snap/snapd/12704 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/snap-store_518.snap on /snap/snap-store/518 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/snapd_12883.snap on /snap/snapd/12883 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gtk-common-themes_1515.snap on /snap/gtk-common-themes/1515 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-3-28-1804_161.snap on /snap/gnome-3-28-1804/161 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/mysql-workbench-community_7.snap on /snap/mysql-workbench-community/7 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/libreoffice_225.snap on /snap/libreoffice/225 type squashfs (ro,nodev,relatime,x-gdu.hide)
tmpfs on /run/user/1000 type tmpfs (rw,nosuid,nodev,relatime,size=760132k,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)
/dev/fuse on /run/user/1000/doc type fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)
tmpfs on /run/snapd/ns type tmpfs (rw,nosuid,nodev,noexec,relatime,size=760132k,mode=755,inode64)
/dev/sdb1 on /media/wolfgang/5E874E5411049E35 type fuseblk (rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096,uhelper=udisks2)
nsfs on /run/snapd/ns/snap-store.mnt type nsfs (rw)
wolfgang@wolfgang-MS-7A38:~$ df -h
Dateisystem Größe Benutzt Verf. Verw% Eingehängt auf
udev 3,6G 0 3,6G 0% /dev
tmpfs 743M 1,9M 741M 1% /run
/dev/sda2 439G 16G 401G 4% /
tmpfs 3,7G 0 3,7G 0% /dev/shm
tmpfs 5,0M 4,0K 5,0M 1% /run/lock
tmpfs 3,7G 0 3,7G 0% /sys/fs/cgroup
/dev/loop0 142M 142M 0 100% /snap/chromium/1708
/dev/loop1 143M 143M 0 100% /snap/chromium/1732
/dev/loop2 62M 62M 0 100% /snap/core20/1081
/dev/loop5 219M 219M 0 100% /snap/gnome-3-34-1804/66
/dev/loop3 56M 56M 0 100% /snap/core18/2128
/dev/loop4 56M 56M 0 100% /snap/core18/2074
/dev/loop6 219M 219M 0 100% /snap/gnome-3-34-1804/72
/dev/loop7 11M 11M 0 100% /snap/nmap/2499
/dev/loop8 11M 11M 0 100% /snap/nmap/2536
/dev/loop9 699M 699M 0 100% /snap/libreoffice/227
/dev/loop10 51M 51M 0 100% /snap/snap-store/547
/dev/loop11 65M 65M 0 100% /snap/gtk-common-themes/1514
/dev/loop12 242M 242M 0 100% /snap/gnome-3-38-2004/70
/dev/sda1 511M 5,3M 506M 2% /boot/efi
/dev/loop13 33M 33M 0 100% /snap/snapd/12704
/dev/loop14 52M 52M 0 100% /snap/snap-store/518
/dev/loop15 33M 33M 0 100% /snap/snapd/12883
/dev/loop16 66M 66M 0 100% /snap/gtk-common-themes/1515
/dev/loop17 165M 165M 0 100% /snap/gnome-3-28-1804/161
/dev/loop18 112M 112M 0 100% /snap/mysql-workbench-community/7
/dev/loop19 571M 571M 0 100% /snap/libreoffice/225
tmpfs 743M 32K 743M 1% /run/user/1000
/dev/sdb1 932G 532M 931G 1% /media/wolfgang/5E874E5411049E35
wolfgang@wolfgang-MS-7A38:~$
Gruß
Wolfgang