Recent content by Fritzeboi

I believe this is hidden how to find these files.. Ican't locate it but i can see these files when i use whstsapp and send files to contact I want to delete these files

Question please help. I am using xiaomi m3. Downloaded a .pdf file in facebook. I can't find the file in downloads or any phone file directory, but i can see this file if i send a document using whatapp application. Can anyone help me please how to locate the file directory. Thank you so much