These are the buildings that have storage inside. Especially the Town Hall, Silos and Outposts. But also harvesters have some storages inside too.
“" Increase your bank's capacity of Twigs, Pebbles, Putty and Goo. " Storage Silos are what holds...Storage Silo
“" Produces Twigs. Used in the construction of buildings. " The Twig Snapper generates Twigs...Twig Snapper
“The Pebble Shiner generates Pebbles, which are used to build/upgrade game items. Pebbles are one...Pebble Shiner