Settings of the File directory of uploaded images

1) when I upload image with the media browser (content>media>upload), my images are stored in the sites/default/file . I added a field image with media file selector to the image file type (Configuration>>Media>>File types with a path to the directory :[site:name]/image/[current-user:name]. This does not work.
2) When I add a field image in the content article with a path this work only when I upload image with the field. But for the insert of this image, I have to use the media browser media icon of cckeditor ...

How :
- 1) set the "default" directory of the uploaded files ?
- 2) can we have a specific directory for different content types ou different groups (OG).

Thank you