Need "only 1 backpack" mod

[NLXero]

(I'm not English so sorry if my english is bad) 

Hello i don't know how to make mod so if someone have time to make one i need help. I want a mod to have only 1 bags slot and all of the bags have storage of 4 (1 leather backpack now give 24 slots istead of 6). For me it's INSANE that our character need 4 backpack to maximise his inventory (how can he carry 4 backpack ???). 

Thanks in advance if someone can make this.

I wish you all good game and good luck.