I would argue that the modern smartphone is different, but by no means better. Between the locked down operating systems and the lack of a physical keyboard they are great for consuming media through approved channels, but basically useless if you want to get any work done with them.
Raid 0 offers no redundancy though. If any of those three disks fail, you lose the entire volume.
For the sake of backups, switching to Raid 5 would be more robust