Put Sprite and Animation on server and load at runtime

Hi everyone,

I am creating a 2D mobile game, in which players can buy new characters. My problem is, I have like a hundred characters. Each characters have 48 sprites with two animations. You can understand that, if I let all my sprites in the local storage of the game, my app will take too much memory on users' phones.

The solution considered is to put all this files in a server and when a player buy a new character, the game download the characters' files in the local storage.

My question is, how can I store all this files properly in a server so the players can download them at runtime ?

I heard about AssetBundle or Addressables but I don't know what solution is the best in my case ?

Thanks everybody.