Verbatim Portable hard drive ? download ent...

Don't know why you might want to do this, but assuming the portable drive is equal to or bigger than your system drive (C:), I would recommend you check out Ghost software (not sure of name) but this will put you on it. With Ghost, you make a mirror image of an entire hard drive. I used it to make multiple copies of entire PC's for classroom use.. i.e. Load one PC with all the OS and program software, and then connect other drives to the "Master" one at a time, until I had a classroom full of identical systems. Had to pull the drives, but since yours is already external, connectivity would be the only issue. USB should work, I would think.