File fields can be added to the volunteer profile or to the hour log. You can use these fields to collect images, forms, certificates, etc.
To add a file field, go to Organizer Dashboard
Next, click on Settings >> Hour log or Volunteers (depending on where you'd like the file field to be added) >> Add field
Insert name of field and select "File" under type
The form will automatically save. This is how it will appear when applied.