Original plastic insert of the box is crappy and you definitely cannot store there everything sleeved. So I created simple trays with numbers to sort base game, 8 expansions with Dungeons, Big box expansion, new big box cards for base game, Quest cards, Boss cards and there is still some space for any 3D upgrades + 2 trays for cards.

Sorting is as per photo:

• base game, 2nd expansion, 3rd expansion, Dungeons
• 4th expansion, 5th expansion, 6th expansion - Portals, empty card tray
• 7th expansion, 8th expansion, 9th expansion, Big box expansion 
• Bosses, Quests, empty card tray, spacer for any upgrades and kill-o-meters

On top of cards, there are rules and two "maps" and spacer with tray for wooden meeples and dice.