Hi.
I run my own it business, i would say just be carefull what you buy. And read reviews on what your buying, check out the warrant on it too, longer the better. Also never ever trust any hard drive for storing important data unless you back it up somewhere else. Hard drives are mechanical devices and as we all know mechanical devices fail, its just a matter of time LOL.
I find alot of people just use the external drive lets say to store the photos. And then for some reason the hard drive dies. Then all photos are gone.
Where as if they bought an external drive just to backup their laptop thats a better option.
Or buy 2. And sync both of the externals.
To be honest, it all depends on how important your data is.
Cheers
John