Redundant local external storage that's not always on

[maiku]

I need a local configuration where I can store data with the following considerations.

1) It's really just local.
2) I can easily use it on another at least Linux machine.
3) Has redundancy so it can suffer at least partial failure.
4) Is encrypted.
5) Can be powered on only when I need it (which will not be enough times to justify a NAS in my mind).
6) Does not require an infinite money budget.

In my primitive mind the only thing I know that serves this purpose is USB so I default to getting a dumb USB enclosure that supports 2 drives and buying two rust platter drives and putting them in a ZFS RAID, etc.

Is there a better way? Seems like the pitfalls of ZFS RAID over USB might make things interesting.
_________________
Michael

[pingtoo]

If there is no performance requirement. I would suggest use two USB storage and just ext4. redundancy is base on automated file system level copy.

This way you can have long longevity as well as easy to move, plus possible versioning to reduce human error.

[lars_the_bear]