Most drives I've looked at get around 400mb a second (I also use https://ssd.userbenchmark.com/ https://ssd.userbenchmark.com/), and the SSDs Apple use are 2500

Most drives I've looked at get around 400mb a second (I also use https://ssd.userbenchmark.com/ https://ssd.userbenchmark.com/), and the SSDs Apple use are 2500mb/s, so 6.25x faster. I priced up the high performance 2TB SSD setup about a year ago, so I'll concede that data point is out of date.