Photo, music and video archival are fairly safe to be in digital formats for short time storage, but surprisingly not for long time archival. Today I learned that normal storage devices are susceptible to data degradation much like the old cassettes and tapes.
As flash storage devices store data as electrical charges, they gradually leak away and lose their state unless powered on often. Their approximate retention age is five years. They are not suited for long time archival. Magnetic disks pose a similar vulnerability too. Just by flipping one bit, your data can be corrupted.