Is that port in your system blue? If it is then its USB 3.0 otherwise 2.0..Data transfer speed also depends on the type, size, bundle etc of selected file/folder. Transferring data is the process of read n write ,so if you have a single file of 4gb it move or copy faster than another folder of same size or even little less, have number of different kind of files....Again moving a file/folder is faster than copying same....