Impossible to delete skin packs and savefile too large

Hi, in the Nintendo Switch version of Minecraft Bedrock Edition I'm experiencing these bugs: I cannot delete the skin packs (that I have owned because they are in the skin customization menu and in the Marketpalce) I have owned, because, neither in the setting menu in the storage section nor in the skin customization menu, there is not an icon or a sort of delete button. The second issue is that the save file on my Nintendo Switch is too large despite I have deleted old world and unused content that I have owned; I have only 3 world (372.8MB) and 2 texture pack (15.5MB) and considering what I just said, the 1.5GB save file seems for me a bit strange.

 

Thank you in advance