Albums or songs?
Tangurena: I usually purchase CDs.I've had hard drives fail. I've had removable (and USB) hard drives stolen. I've lost user accounts to online stores (when they tied them to email addresses I haven't used in years) so I can't reauthorize or redownload what I already paid for. When I lived in South Florida, I found that CD-Rs basically erased themselves in the heat/humidity down there (so a CD-R was good for maybe 1 year before it became unreadable).