I have a 500 Gb Seagate Drive plus six USB drives of various sizes. I use a variety of backup means offered by Microsoft Windows and others. But I do religiously backup important things like my music and documents.
I also have two partiotions on my laptop, one for OS, and another for a second back up.
I learned the hard way after a drive died on me several years ago, a standard hard drive in a case, and I lost everything on it, including 1500 songs.