First, "midv945rmjavhdtoday" seems like a filename or a version identifier. Maybe it's a software or firmware name with a date attached. "today" could indicate the date is part of the version, like March 9, 2024 (since today's date is March 9 in this context). The numbers "015845" might be a time stamp—01:58:45? So the full identifier might be midv945rmjavhdtoday20240309015845 or something similar, formatted as midv945rmjavhdtoday{date}{time}. Then "min upd" probably stands for "minor update" or "minimal update".