What about hetzner storeagebox? https://www.hetzner.com/de/storage/storage-box/ with client side encryption ? It’s cheap and reliable, supports all common file transfer methods - the encryption can and likely should anyway be done by your preferred backup tool?

I have a tuxedo computers notebook for work and it’s great. They offer Intel as well as AMD. I also know about Slimbook but never owned one.

Immich is such a cool piece of software 🤩