If you see a file under 400 MB claiming to be full Office 2019/2021/365, it is either broken, crippled, or a virus—often all three.
Office (2016, 2019, 2021, 365) is not a collection of loose text files. It's compiled code, databases, and assets. You cannot compress 2-3 GB of software down to 200 MB and have it function. ms office highly compressed for pc