Updating to newer files with different disk formats

[Joel via Digitalmars-d-learn]

I found using timeLastModified from macOS drive to ExFat, macOS 
has higher precision than ExFat[0], so a different number. My 
little program lists the files to update, but I get files to 
update still, after updating them, because of the differences 
with the disk formats.

[0] from time: 2020-Nov-06 13:29:30.5897005, to time: 2020-Nov-06 
13:29:30.58
Potential 
copy("/Users/joelchristensen/jpro/dpro2/AbcKids/LettersO/d.wav","/Volumes/PNY480/jpro/dpro2/AbcKids/LettersO/d.wav");