Portable hard drive and backing up data?

I got myself a 1TB portable hard drive and "backed up my data." Forgive me for my ignorance, but when I go into the hard drive on my laptop, I cannot access much of anything. No photos, videos, programs, music, nothing... is it there and I just can't access it? It took up over 400GB of space but I... show more I got myself a 1TB portable hard drive and "backed up my data." Forgive me for my ignorance, but when I go into the hard drive on my laptop, I cannot access much of anything. No photos, videos, programs, music, nothing... is it there and I just can't access it? It took up over 400GB of space but I can't access anything. Is it supposed to be like that? Thanks
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