::Rename all files in directory '.' to names like '2020-03-27 10-44-55.jpg'
::based on files timestamp.
::(plus a copy number with a leading '_' if a file with the same name already exists)
::After some tests change TestName to FileName !
::-ext "*" --ext . -> all but those with no ext; https://exiftool.org/exiftool_pod.html
exiftool.exe -k -ext "*" --ext . -P -d "%%Y-%%m-%%d %%H-%%M-%%S%%%%+c.%%%%e" "-TestName<FileModifyDate" .