“用作储藏所的”可以用英语表达为“used as a storage facility/place” 或者 “serving as a storage depot/area” 等，具体使用哪种表达可根据语境和搭配灵活选择。例如：
* This old building is now used as a storage facility.（这座旧建筑现在被用作储藏所。）
* The basement is serving as a storage area for seasonal items.（地下室被用作季节性物品的储藏区。）