I have a notebook with Ubuntu 22.04LTS installed (no dual boot). It has two SSDs disk: one with 1TB and another one with 512Gb. I have more than 1TB in my Google Drive and I would like to have my files available locally too. Hence, I would need to use both SSDs together in order to have enough storage for that. How can I do that? I would also like to do so in a safe fashion, so please let me know if there are any risks to doing that.
I have added some extra information below. I am unsure what information is important sharing to get a meaningful answer to this question, but if you need more info just comment and I will edit the question! Thanks for your help!
By running df -x squashfs I get the following output:
Syst. Archives 1K Blocks Used Available Usage% Mounted in
tmpfs 800216 2416 797800 1% /run
/dev/sda3 959783984 910971452 0 100% /
tmpfs 4001068 30892 3970176 1% /dev/shm
tmpfs 5120 4 5116 1% /run/lock
/dev/nvme0n1p1 204580 5360 199220 3% /boot/efi
tmpfs 800212 156 800056 1% /run/user/1000
/dev/nvme0n1p4 480612276 9326144 446798948 3% /media/roberto/RAIZ
/dev/nvme0n1p3 5074592 3593948 1202116 75% /media/roberto/RECOVERY
The two system archives I am interested in putting together are /dev/sda3 and /dev/nvme0n1p4. /dev/sda3 is the one where I currently have all my stuff saved and where all my programs are installed. /dev/nvme0n1p4 is mounted in /media/roberto/RAIZ, and RAIZ means ROOT.
