For a big place to keep all your items in Minecraft, consider building a large storage warehouse. Here are some ideas:

1. Design Concept: A multi-level warehouse with distinct storage areas for different item categories (e.g., ores, tools, food).

2. Theme: Industrial style with a modern touch, featuring large windows and open spaces.

3. Materials: Use stone bricks, wood planks, and iron blocks for a sturdy look. Incorporate glass for windows.

4. Size: Aim for a structure that is at least 20x30 blocks, with multiple floors for ample storage.

5. Features:

   • Item Sorting System: Implement redstone mechanisms for automatic sorting of items into chests.
   • Labeling: Use item frames or signs to label storage areas clearly.
   • Access Points: Include multiple entrances and ladders or stairs for easy access to different levels.
   • Decorative Elements: Add shelves, barrels, and crafting stations to enhance functionality.

This design will provide a spacious and organized area to store all your items efficiently.