PROBLEM FIXED by flashing latest SYS-B1.50, APP-B2.50 and FPGA V25 !!! 
My DSO arrived just this week with versions:
DS203 Mini DSO Sys 1.41
DS203 Mini DSO app 2.45
It shows “Parameter reload error” with every PwrOn and all suggestions to solve it, as e.g. re-formatting did not solve the problem.
However, I get 1KB binary files, all having identical filenames “8D40AD7D.WPT” ! and surprisingly empty “Date modified” and “Date accessed” fields in Windows file ecplorer.
When I open up a file for reading (in text editor vim) I get afterwards a “Date accessed” and when I write that file back to disk, it also get a valid “Date modified” entry.
But reload error still persists.
Then I tried creating a text file with some content to see if general file capabilities are possible. The file is perfect and readable after reboot.
But error still persists.
Tried to save some Wave DAT files, which was confirmed as ok and the files appear in Windows, but also no modification or acces time entry.
When trying to “Load File001.DAT?” it displays "Load File001 ERR "
Please help me in solving this issue, because its so annoying setting up every setting with every PwrOn and missing wave store/reload hurts.
Regards Joe