SQL Server数据类型来存储字符串，并且占用更少的空间

I have a question in regards to data types that are available in SQL language to store data into the database itself. Since I'm dealing with database that is quite large, and has a tendency to expand over 150GB+ of data, I need to pay close attention and save up every bit of space on the server's hard drive so that the database doesn't takes up all the precious space. So my question is as following:I have a question in regards to data types that