Is the vault used or share with all characters

i used FL4k, but i always see there was drops of others characters stuffs in the game, and i start new character too, but i haven’t reach the space ship , so i can’t check the vault , so i wonder, the vault is sharing with all characters or it’s seperated vault, if not, why we see there were drops of others characters stuffs in the current character, like FL4K

Yes, it is shared across all your save files.

yes, after reaching the space ship, i find it.

thank for ur info too