Make it autoconfigure root subvolume

[rain1]

I have BTRFS disk on Debian but it still says:

Select BTRFS system disk with root subvolume (@)

Even tough I have root with BTRFS (I actually just want to make snapshots for /media/data):

UUID=02ef6261-0ab3-489c-a3ea-d12245d0ef76 /               btrfs   defaults,subvol=@rootfs 0       0
UUID=9c76582a-95c4-437c-abf2-81e3542665ae /media/data btrfs defaults,subvol=data 0 0

It can be a bit overwhelming for new user to figure out how format and configure everything. I have read the different manuals, watched different youtube videos and asked Chat GPT for weeks but still cant get it to work.

Can you make it so that instead of only showing the error message it would offer option to re-configure BTRFS and fstab so that whatever disk I select would become a new root subvolumne? Optionally if it is needed to re-format or re-partition the disk could ask confirmation for that.

Problem is that every Youtube video instructs how to make entire system snapshotted and that requires advanced things like messing around with grub configuration and so on. but I don't really want to go after grub hacking. I just want to snapshot my data. And my starting point is empty hard drive so it would be completely fine for Timeshift to partition/format/configure it from scratch so that it can become a root subvolume.

[abfipes12]

notice that you have @rootfs instead of @
why exactly does timeshift have a feature that only allows @ and @home subvols named exactly like that? how often do people change the name of their root subvol and if it is necessary to keep the name of that subvol consistent, cannot it be stored/tracked?

[rain1]

Thanks for pointing out that @rootfs vs @ difference. Debian's default is @rootfs and other linuxes seem to default to @.

But still would be cool to be able to do snapshots of just @home. Because I may not always care about OS. Like if it for example my personal Samba server where I am the only user then it would actually take less tome to just re-install OS if it breaks than to set up snapshotting of root because getting it to snapshot @rootfs would take like 2 months of reading every single BTRFS manual I can read on the internet while reinstalling OS + samba server would take like 2 hours so reinstalling OS in case of accident is clear winner in this choice. However @home would be nice to have snapshotted because for that I may have a separate hard disk and data that I do care about. And that shouldn't be artificially limited. I should be able to tell that "ok this is my blank hard disk for data, partition, format, configure it so that I can rollback if something happens".