Compatible with multi-surface mods (like Space Exploration, Factorissimo), item transportation works on one surface, but not between them.

Should be UPS-friendly because using events to track entities, not find_entities_filtered.

Not working with fluids, but works with barrels.

Glory to the buffer chests!

Update 1:

• Fixed crash when mod added to existing game.
• Constant combinator "Quantum Storage Interface" that outputs combinator surface storage content as signals.

Update 2:

• Fixed crash when robot remove chest.
• New runtime preference - if checked same chest can push items to storage and then fetch requested.
  If not - like before, items can be sent to storage only if request slots all empty.

Update 3:
Some modpacks can have just too much different items.

• Click storage item button to send it to compact table frame.
• • Frame is draggable by square striped drag-handler, that appear in top-left corner if there are things to display.
• • Click small icon to return it to top bar.
• Shift-click item button to set this item to be restricted - no more such items will be added to storage until small item icon in compact table frame clicked.

Update 4:

• Better handling overproduced items - now it will not try to put into quantum storage entire chest content in a bulk, but put what can be put.
• Fixed issue with invalid item id in quantum storage, for example after deleting mod.

• Added second number cell under item icon, indicates sum of all logistic requests for this item in all registered entities on that surface.

• If sum of all logistic requests for one item type on that surface will become higher then avaiable items supply in storage, then not a single one of this particular items will be given out from storage for this time.

• • This ensures what in case of resource shortage every registered requester got it's fair share.

• Added clone of green logistic buffer chest placed into circuit-network subgroup.

• • This is just to make it unlocked from the very start, but not mess with other mods if they do something with logistic entities and/or technologies. Costs a few iron plates.
• • To get rid of flashing "not in logistic network" you can use, for example, https://mods.factorio.com/mod/BorderedAlertIcons_NtmFork

Update 5:

• Removed feature that causes severe perfomance drop on medium-big bases and re-implemented it in a better way.
• Probably final update, further plans require remade from scratch.