Upload web documents to the local plone 5 server

Hello to the community,
I created a small site for testing outside of plone 5.
I used the Wysiwig BlueGriffon editor (I could have used TinyMCE).
I am trying to transfer the web documents (HTML files, images, pdf, css etc) in a folder to the plone 5.1.6 server also installed on my local computer under Windows 10, successively by WebDav then by FTP, but the result is surprising because on arrival, the files are truncated or more exactly the files display 0 kb.
What did I miss to get this result?
What precautions should I take to avoid this malfunction?
In advance, thank you for your insight.

Hello everyone,
on my local computer under Windows 10,
With plone 4, html files are uploaded without any difficulty.
But have the same problem with plone 5.2.5., only the name of the html file is transferred but not its contents.
what do i need to do for the upoad to work?
Thanks in advance