MB3 174b: Emptying a Storehouse on Shabbos (333:1-2)

Beginning to empty a storehouse (of non-muktzah items) on Shabbos to use the space vs. to use the items (טירחא יתירה). What if you began before Shabbos?

Moving items in a storehouse aside to make a path or for a דבר מצוה (e.g. הכנסת אורחים, סעודת מצוה).

The permissible way to empty items from a storehouse on shabbos.