We are also a packaging manufacturer, had another storage building a block away and just purchased an additional building right next door to that. If you use it to store raw materials and / or WIP, you might need to do a little extra work to it or prepare the items being stored (wrap or otherwise cover them) but if just storing finished goods our auditor informed us that the requirements we mostly condition, cleaning and maintenance since there is no manufacturing done there. We opted for making it suitable for everything except manufacturing. We skinned the inside and sealed it from the outside, pest proofed the docks, added lighting, cleaned and repaired the floors, added it to our master cleaning schedule and passed the first year and every other year since. Plans are to do the same to the new building.