The general section works fine with the following:
karl@3400g:~> grep -A3 'General' ~/.config/kded_device_automounterrc
[General]
AutomountEnabled=true
AutomountOnPlugin=true
AutomountUnknownDevices=true
karl@3400g:~>
The device sections are a terrible mess:
karl@3400g:~> grep Device ~/.config/kded_device_automounterrc
[Devices][/org/freedesktop/UDisks2/block_devices/nvme0n1p1]
[Devices][/org/freedesktop/UDisks2/block_devices/nvme0n1p2]
[Devices][/org/freedesktop/UDisks2/block_devices/sda1]
[Devices][/org/freedesktop/UDisks2/block_devices/sda2]
[Devices][/org/freedesktop/UDisks2/block_devices/sda3]
[Devices][/org/freedesktop/UDisks2/block_devices/sda4]
[Devices][/org/freedesktop/UDisks2/block_devices/sda5]
[Devices][/org/freedesktop/UDisks2/block_devices/sda6]
[Devices][/org/freedesktop/UDisks2/block_devices/sda7]
[Devices][/org/freedesktop/UDisks2/block_devices/sda9]
[Devices][/org/freedesktop/UDisks2/block_devices/sdb1]
[Devices][/org/freedesktop/UDisks2/block_devices/sdb2]
[Devices][/org/freedesktop/UDisks2/block_devices/sdc]
[Devices][/org/freedesktop/UDisks2/block_devices/sdc1]
[Devices][/org/freedesktop/UDisks2/block_devices/sdc2]
[Devices][/org/freedesktop/UDisks2/block_devices/sdc3]
[Devices][/org/freedesktop/UDisks2/block_devices/sdc4]
[Devices][/org/freedesktop/UDisks2/block_devices/sdc5]
[Devices][/org/freedesktop/UDisks2/block_devices/sdc6]
[Devices][/org/freedesktop/UDisks2/block_devices/sdc7]
[Devices][/org/freedesktop/UDisks2/block_devices/sdc9]
[Devices][/org/freedesktop/UDisks2/block_devices/sdd]
[Devices][/org/freedesktop/UDisks2/block_devices/sdd1]
[Devices][/org/freedesktop/UDisks2/block_devices/sde]
[Devices][/org/freedesktop/UDisks2/block_devices/sde1]
[Devices][/org/freedesktop/UDisks2/block_devices/sdf]
[Devices][/org/freedesktop/UDisks2/block_devices/sdf1]
[Devices][/org/freedesktop/UDisks2/block_devices/sdg]
karl@3400g:~>
I don’t bother.
On the other hand the Linux Kernel Monkey did an excellent job with udev and its on demand mounting. Some tailored output provides everything needed:
3400g:~ # lsb
MODEL LABEL SIZE FSTYPE PATH UUID
Samsung SSD 850 EVO 250GB 232.9G /dev/sda
850EVO250GB 100M vfat /dev/sda1 404C-1EC8
TW-test 30G btrfs /dev/sda2 f991e6d5-fbb3-4f8a-8c5c-04b24c6495a1
Leap154 40G btrfs /dev/sda3 337219d4-b3bd-43d2-9cd3-45f8f53269bd
Fedora 29.3G btrfs /dev/sda4 95a1cc9a-3a30-455d-b3bc-764202e94522
Manjaro 27.9G ext4 /dev/sda5 172e21e3-9964-4708-9651-e6c52906c58e
Kubuntu 29.3G ext4 /dev/sda6 8226cbe9-6836-47a9-a5cd-9dfa223b51fa
29.3G ext4 /dev/sda7 8dd05b5d-31af-4af2-9970-55fadeb988d2
16M /dev/sda8
46.9G ntfs /dev/sda9 065437EB5437DBDD
Samsung SSD 850 EVO 500GB 465.8G /dev/sdb
850EVO500GB 100M vfat /dev/sdb1 7739-823F
Albums 465.7G btrfs /dev/sdb2 10726d74-53da-41e8-a3ed-7af130722783
STORAGE DEVICE 30.2G /dev/sdc
DMC-TZ71 30.2G vfat /dev/sdc1 0518-01CC
SSD8 3.6T /dev/sdd
Crucial 3.6T btrfs /dev/sdd1 47e6d9ee-e910-4ea4-8c8f-7ac75f49a4d3
ST8000VN004-2M2101 7.3T /dev/sde
Seagate 7.3T btrfs /dev/sde1 2260f160-cc05-47cc-9893-cc32c050177d
Samsung SSD 950 PRO 512GB 476.9G /dev/nvme0n1
950PRO 100M vfat /dev/nvme0n1p1 6DEC-64F9
Tumbleweed 476.8G btrfs /dev/nvme0n1p2 e7ad401f-4f60-42ff-a07e-f54372bc1dbc
3400g:~ #
KDE automounts go by default to directory /media with the labels used as mountpoints unless defined differently in /etc/fstab.
3400g:~ # df -h /media/DMC-TZ71/
Filesystem Size Used Avail Use% Mounted on
/dev/sdc1 31G 12G 19G 38% /media/DMC-TZ71
3400g:~ #
KDE System Settings > Removable Storage > Removable Devices needs a redesign based on UUIDs and labels.