This guide will let you know how to add a bag in GTA 5.
The first thing you will need to do is install the menyoo mod and then press F8 twice to open the mod.
After that, navigate to Player options and go to Wardrobe. Scroll down a bit, and you will find “task/armor”, click on that.
Set the “Type” value from 1 to 6. You will get a different bag for setting different values here.