I'm shopping around for an SSD to replace my aging magnetic HDD in an old laptop. I see that they make SSDs as small as 8GB. How does that work? I'm guessing that you load your OS onto the small SSD and insert a separate HDD for files or just connect an external. But is 8 or even 16GB adequate for Windows? Seems to me like you would want a minimum of 128GB. But then those small SSDs are very cheap.