Ok, moving away the rules files leads the Harddrive to show up.
It appears in /media under the name "4777707B117F74F2".
Running
a) sudo skdump /dev/sdb ejects the harddrive and tells me: Failed to open disk /dev/sdb: Invalid argument
b) sudo skdump jmicron:/dev/sdb ejects the harddrive and tells me: Failed to open disk jmicron:/dev/sdb: No such device
Ok, moving away the rules files leads the Harddrive to show up.
It appears in /media under the name "4777707B117F74F2".
Running
a) sudo skdump /dev/sdb ejects the harddrive and tells me: Failed to open disk /dev/sdb: Invalid argument
b) sudo skdump jmicron:/dev/sdb ejects the harddrive and tells me: Failed to open disk jmicron:/dev/sdb: No such device
Dmesg log after the eject is attached.