On a personal note, my 200,000 or so image files are named with YYYY-MM-DD-HH-MM-imgXXXX.jpg
I've had to use the dir /X command once in a while to figure out the 8.3 filename.
What kind of value is XXXX?
I just created an empty text file called:
2017-07-12-13-14-imgthis is a really long file name will this make it go weird in command prompt - nope that's not enough how about this will this make the command prompt go weird and all 8-3 on us.txt
and in both standard cmd and powershell it displayed the filename in full on Win10 64bit Ent.
Typically XXXX are sequential values from img0001 to img9999 until I move the pictures off the camera and to my hard drive.