How do I mount internal drives for additional storage in MicroOS?

Hi! I am new to MicroOS and unclear on how to mount internal drives for additional storage.

I am using the Gnome edition. I have two internal drives; a nvme for the system, and a SSD for Home backups and Steam Library. I cannot mount the SSD (ext4). Or rather, I cannot get the mounted drive to persist after rebooting. I have tried using Gnome Disks by deselecting User Session Defaults, which works for me on other systems. Doing this creates the record in /etc/fstab, but doesn’t actually auto mount the drive after rebooting. I have to manually do so using Nautilus. I can manually configure fstab using vi, but still not auto mount to it.

I think my confusion is in how to manually mount using the terminal in the MicroOS way of doing things. I think I am supposed to use transactional-update --root, but that is not clear to me. I am not clear if I should be doing this in transactional-update --root , or by some other means like simply su.

I can create a directory using terminal just fine, but not mount to it.
sudo transactional-update --root then,
sudo mkdir /mnt/storage
Mounting to that new directory does not persist.

I could use some assistance on how to do this in MicroOS. Must I mount to a directory under Home? Must I use sudo transactional-update --root . Or am I supposed to do this some other way in terminal?

Thanks!

Edit: sudo transactional-update shell was used, not --root.

I think I answered my own question. I added (corrected) my entry in fstab to this: UUID=c45f7102-1d61-4eab-bd98-73e9a2b7ebf8 /mnt/storage ext4 auto,nosuid,nodev,nofail,x-gvfs-show 0 0

I added “ext4” and replaced the space after “auto” with a comma. Not sure which fixed it, but it’s rebooting without the error now.

I am still interested if there is a better or preferred way of doing this.

Also,I am interested in how to add additional drives during installation. I am not at all familiar with btrfs. This is my first foray. Also,

@nacho_trebuchet If using the full install dvd, then you can select the partitioning then select keep exiting layout and add devices, mount points etc as required, if already containing data, make sure the do not format option is selcted.

After install, can always look at using cockpit-storage if cockpit components are installed.