the file component requires WRITE_EXTERNAL_STORAGE permission to store files in the ASD - application specific storage
you might want to use the EFile Extension by vknow360, this is a copy of the MIT App Inventor file component, without requesting permissions
btw. you might get more help, if you follow this recommendation (taken from How to ask a question (open new topic))
Note : Make it as easy as possible for those who are helping . Especially:
→ Write in English and
→ use English blocks (set the language in the Designer - temporarily - in English).
Taifun
Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by 
Taifun.