Is this a good setup

I asked before what i should try and what is good. Now i played a little bit around and have now this: true nas installed on a ssd and then immich on 4tb hdd that is mirrod on antother 4tb and the postgres from immich is on a sata ssd, also i have an external drive were i make backups about every month. So my question is, is there anything i could change or improve?