I just got a Samsung T5 external SSD and it says it should reach up to 540Mb/s yet when I try to transfer files to it from my internal hard drive which has a speed of around 420 Mb/s I get a top transfer speed of only 20Mb/s. I have the SSD plugged into a USB 3.0 port and the device is 3.0 compatible. Am I doing something wrong? Why is the transfer speed so slow? Any help would be appreciated. I am using windows 10 on a Dell Inspirion 13-5378 laptop.