Single copy is most common. I haven't seen reliable data on the split between a copy in the cloud vs a copy on an external drive, but those would be 2nd and 3rd

Single copy is most common. I haven't seen reliable data on the split between a copy in the cloud vs a copy on an external drive, but those would be 2nd and 3rd most common, with cloud growing to cut out both external drive and single copy. I have family members who have had and continue to have user induced data loss due to single copy, but even single copy + cloud because they insist on passwords being b.s. so they don't write them down, don't remember them (due to arcane rules requiring them to pick a password they can't remember without writing down), and then the device has some problem that requires a reset, and then they can't get into their online account because they failed to properly set (and apparently weren't required) the recovery account or phrases.