Need help with toy box saves on infinity 3.0

I play on xbox one ... Whenever I have saved a toy box I've never seen any options to save it to multiple places . I had a friend come over and sign in to my xbox using his gamer tag and we created a new toy box put a bunch of stuff in there saved it ... Sure enough when we went to saved toy boxes it was there . So I tried my last resort and erased all of my saved content for the game . Replayed the opening tuition and created a toy box and sure enough it saved fine . Luckily I'd only been playing a couple of months so I've not lost to much