装修时会收到很多合同、收据、发票、小票，和客服的聊天记录。
家里用的很多都是耐用品，后期出现问题无论是退换货还是维修，
有了这些东西都会方便很多。
单独准备一个档案单，把实物类的都装一起。
电脑做个文件夹，把网购的截图都存一起。
需要时一找就找到，不需要也不占什么地方。
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