===== top level separation =====
Situation:\\
I have a directory (say source/) with many sub directories and files under it (source/dir1, source/dir2, ... , source/file1, source/file2, ...). I want to copy it to two separate folders (say destA, destB). The first folder contains all the top level files (source/file1, source/file2 etc.,), the second folder contains the rest (source/dir1, source/dir2 etc., but not source/file1, or source/file2 etc.,).

Solution:
There are two approaches I can think of. Both work. I prefer the second one as it is a bit cleaner.

Approach1:
<code>
rsync -prltvzD -n --delete-after --exclude='/*/' source/ destA/
rsync -prltvzD -n --delete-after --include='/*/' --exclude='/*' source/ destB
</code>

Approach2:
<code>
rsync -prltvzD -n --delete-after --exclude='*/' source/ destA/
rsync -prltvzD -n --delete-after --include='*/' --exclude='/*' source/ destB
</code>

In both approaches, the destA and destB directories will be created on the fly if necessary.

==== useful links ====
  * https://linuxize.com/post/how-to-exclude-files-and-directories-with-rsync/ - shows how to exclude files and directories with rsync; goes over many cases with examples and simple explanations.

==== miscellaneous ====
tags | include all sub directories but exclude top level files, exclude top level directory, exclude all subdirectories