What I have found is that when I load MIDI files onto a thumb drive I get these extra files. I can’t see them with my Mac, but I can see them when I look at the folder on my Disklavier. They do not play… These junk files are arranged first before I get to my “real” MIDI files. they have extra characters in front of the actual file name. For example, I just added a MIDI to my thumb drive and on my Disklavier it is showing as 001:._The Entertainer.mid. There is a period and underscore before the name of the track. This is the junk file and needs to be deleted. This was my work around, individually delete each one of the junk files through the Disklavier device. A bit of a pain in the *** but It worked.
Thanks for that information Bill! I have a Mac so I will have to try it :)
Bobbie