Separate 2 disks from the same ZFS pool (no mirroring)

At the time I thought it was a good idea to use ZFS for my multimedia disks. Large disks that are going to contain a lot of large files. I want to change these disks to another format that is well integrated in the Linux kernel to avoid the problems I am having now.

My question is about 2 HDD disks that are joined (not mirrored) in the same pool:

pool: multimedia2
state: ONLINE
NAME                                    STATE     READ WRITE CKSUM
multimedia2                             ONLINE       0     0     0
7527cfd0-ff91-ef4c-8339-e50e8ea6f88a  ONLINE       0     0     0
48ab2779-9338-e943-ab90-363ace47d27e  ONLINE       0     0     0

They are very large disks (in total about 31 TB) and I don’t have a third disk to be able to backup all the content of both disks at the same time. But if I could separate them, I could backup each of them to the other while reformatting the disk to another file system.

Is it possible to separate and keep the data on each disk?

Just to make sure I understand:
This is one pool striped over two disks?
Do you not have a full backup? (this can be dangerous as you loose all your data if any one disk fails)

You can split a mirrored pool into two (see for example:

I very much doubt you can split a striped volume.

Yes, it is.