A family of Microsoft word processing software products for creating web, email, and print documents.
Mine are files downloaded from the internet and others which were attached to emails, they seem to be being handled by One Drive, Personal or something like that. Sorry I am not technical. But when I looked in my One Drive account they were not there. They are word documents which word says I do not have permission to delete.
I finally found I can delete them in file manager.
Sorry I so not know the full path of the files as I have deleted them now.