Spinning disks share most of that; they're just cheaper per gigabyte and slower. A spinning disk (is not and has never been sufficient to store important data.

Spinning disks share most of that; they're just cheaper per gigabyte and slower. A spinning disk (is not and has never been sufficient to store important data. At least with SSDs the form factor can be a lot smaller, so we might see slower, cheaper ones appear more often as external drives for true portable backups. Having your data on two SSDs is better than one spinning disk, especially if one of the SSDs is usually unplugged.