• Well,

    thanks for the hint...it sounds tedious, but - at least - should not take too long.

    What I will now have to test, though, is whether there is a limit of "file parts" because of the range of the added "number". Having a limit would be a killer for measurements at regular intervals (e.g. current GPS position) which would simply be added to an existing file: 253 or 254 extensions would be far too few