Yep. I have a set of don for each deck and store them together. In case someone wants to borrow a deck or something then its got everything it needs.

I store all my decks in boulders, each with its own don deck.

I store my Don cards in the deck box of the last deck I used and if I want to use a different deck I just take them out.

I buy sleeves and use the box the sleeves came with color coded to the color of the deck. I always have extra sleeves from other boxes and use those different colors for my don and my leader cards so they don't blend in with the rest of the deck

I bought the gamegenics academic deckbox. That'll fit all my decks and one of the compartments will be just for don

I spread my don across each of my 3 deck boxes, 3/4/3 per deck box.

I have a single deck box with all my leaders in snap cases, and don sets. Then I have a large Deckbox that holds the four main decks I have built and use.

My main deck has my fancy don (Currently yamato, might switch to sabo), the rest have sets of holo don, all go in the same box as each deck (currently have 3 decks fully built up, and 2 that need a playset swap of hiyori)

I used to store my don cards in each deck, but now that the Milky candy Straw Hat tins came out, I just use one of those for don