What would be the best way to copy the contents of my external hard drive to another external hard drive for backup purposes? Would this be the a good way to have a back up? I plan to keep using the original. Thanks in advance.
Why not... if it's a DATA drive (the OS drive will not be functional if just a FileCopy is done)? If it's a big one, it'll take a while...
SyncBack works very well for such copy operations, and even their free version is often all you'll need.
Also disable antimalware while copying (especially if you use WD) - it can improve speed significantly.