Copying Music

When copying music from one ext hdd to another using xcopy, which commands should I use?
Also, which is best, new SSD or HDD?
I always use file explorer and just drag and drop. 
Drag and drop or click on the first tune, hit control + a, that highlights all files, copy and paste. any decent HDD 7200 RPM with a minimum 64 mb cache. I like seagate or WD.
You do know how to use diskmanagement to set your new HDD up for slave
Decent xcopy site, dont know what OS you're running thought I'd throw that in there.: