[pertymcpert]

You still need to back up your disk somewhere right? Disks age and fail.

[zorrotorro]

You backup the disk to more disks. Isn't that how it's done?

[Aerbil313]

Related, but why phone disks don’t age and fail? Simply because of low r/w?

[pertymcpert]

I think they do, but my guess is that most people don't keep their phones long enough for that to be the reason to stop using the phone. Usually the phones get damaged/lost/too slow to run modern apps etc.