Hi,

I had a drive with the following settings:

lsblk --output NAME,KNAME,FSTYPE,LABEL,UUID,SIZE
NAME   KNAME FSTYPE LABEL                  UUID                                
  SIZE
sda    sda   udf    UDF-Externe-Festplatte 589edd3fLinuxUDF                    
931,5G
������sda1 sda1  ntfs   NTFS1000MB             6D1B61A41DAB9E71                    
 1000M
������sda2 sda2  ext4   Linux-Externe-FP       c8442952-f42a-4e91-baf6-6957e30e345c
930,5G

In Dolphin it got mounted the wrong way: by clicking and mounting /dev/sda2,
the corresponding mount command used instead the parent device information (i.e
udf not ext4) an caused an error:

Error mounting /dev/sda2 at /run/media/andreas/UDF-Externe-Festplatte:
Command-line `mount -t "udf" -o
"uhelper=udisks2,nodev,nosuid,uid=0,gid=0,iocharset=utf8" "/dev/sda2" 
"/run/media/andreas/UDF-Externe-Festplatte"' exited with non-zero exit  status
32: mount: wrong system filetype [���]

The mount command (whatever put this together) should use the *actual*
partition information and not the parent one. 

Trying �� mount /dev/sda2 /run/media �� works just fine, but the compositing of
the command above needs to be revisited, I guess somewhere in the udev
framework.

On
https://forums.opensuse.org/showthread.php/526602-automount-USB-external-drive-Error-mounting-dev-sda2-(wrong-filtype-udf-vs-ext4)-udev-problem
we fixed it by backup data, erasing the drive with command 

dd if=/dev/zero of=/dev/sda  bs=4096 count=8

��� and partitioned it anew with gparted (previously it had some UDF history that
got not erased but now its properly set due to the dd step).