I've learnt to trust hard drives and devices less when it comes to data storage so whenever I have important data to keep I simply upload it on a cloud service.
The recent Wizkid incidence where he lost most of his works due to computer crash also reminds me on how important cloud storage is.
I've been using Fourshared for many years now.
I also like Google Drive because of it's simplicity.
iCloud is also popular among apple computer product users.