A File field can be inserted in:
- an Admin Page, as an option or a user_meta
- a User Profile, as a user_meta
- a Metabox, as a post_meta

The code below is used to generate this section in an Admin Page, for an option:
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A File inherit from a Field, and an Item, then all settings described in Field Settings and Item Settings are also used.
Specific settings for File:
| File Settings | Description | 
|---|---|
| placeholder string / Default: ” | The placeholder label shown when the input field is blank | 
| label string / Default: ” | Label shown in the display preview if no file uploaded | 
