It'd be helpful to have a simple way to determine if a path is a folder or a file, e.g. with a function like IsDir(), similar to is_dir in eval columns.
A workaround could be to use FilePart and Stem and see if they match, and if they do it's probably a path (I say probably because technically it wouldn't work with a file that has no extension).
Testing for a trailing backslash works well, it's just so clumsy 
isDir=Right(filepath, 1)=="\"
We'll add IsDir and IsFile in 13.8.1.
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