大家都是怎么储藏的？

刚才看到大妈猪的贴子里提到在Costco买的yeast “put it in each individual begs, then put all in the Ziploc (double zipper)and put in the freezer“，大家都是这样储藏吗？难怪，我曾经在Costco买的半年就失效了，我就这样放在外面的,没放在冰箱里。是放冰室还是就冷藏？