I just upgraded the NKStorage to the latest firmware, using OSX.
Nothing was on my encrypted volume, so I added a README.
I unmounted both partitions, and moved the device over to a fedora33 box.
The Nitrokey App on fedora is 1.4.2. I unlock the enc volume and the root dir is crap.
I move back to OSX, and unlock, and the README is there.
> drwxrwxrwx@ 1 dap staff 8192 10 Jun 13:50 . > drwxr-xr-x 13 root wheel 416 10 Jun 13:56 .. > drwxrwxrwx 1 dap staff 8192 10 Jun 12:57 .Spotlight-V100 > drwxrwxrwx 1 dap staff 8192 10 Jun 13:50 .fseventsd > -rwxrwxrwx 1 dap staff 927 10 Jun 13:17 README
Here is the view on fedora: