A:AnswerHello,
Yes you could do either of those options! Please keep in mind that Windows is installed on the SSD, so you would have to reinstall it if you replace the SSD.
A:Answeryes, it is possible but sometimes the website's lag so to me it can but if the websites lag sometimes then you need to upgrade the ram just be careful.
A:AnswerI do not know about the adapter but yes you can upgrade this PC you just need the right parts like rams, GPU, CPU but most important is the power supply do some research on which power supply is best for the GPU or CPU.