Is there just a way to drop off luggage and then pick it up same place days later?

I can understand the Casa Ivar service with the shipping from another location and picking up later in Santiago, but we will be passing through Santiago on our way to Sarria, where we will begin walking just the last 100K of the trail back to Santiago. I would just like to go somewhere in Santiago and drop off the several suitcases we have and then pick those suitcases back up like 8 days later in Santiago after we do the walk. I don't need to ship anything or have anything transferred, just stored.

Is that is not something Casa Ivar does, can someone please recommend the best option for just luggage storage in Santiago. Thanks.