I am newbie to Drupal 8, so sorry if my questions are obvious.
i would like to extend file core entity, to add some custom fields like category, year, etc.
I saw there is a module which seems to do that : file entity
unfortunately it seems not to be currently ready for Drupal 8.
So is it an easy way to do this ? Creating an inherited entity ? but how to translate it to database ?
Is it a documentation or tutorial which could help me ?