Indexer

With this addon you'll be able to storage and get all your items from your chests, as long as they are next to each other. Place your chests next to each other, or one above another, then place the Indexer in the same way. Now you'll have all of your chests inventory connected.

Be mindful of whatever block you place next to your chests, because the indexer will get the inventory of any block that has one. If you don't want a specific chest, barrel, furnace, shulker, etc. in your indexer, simply leave one space empty/with any other block.

(Doesn't require experiments to be enabled)