It says the M2 and SATA ports are limited to 2TB, but I can't imagine why that's the case.
Could there be a limit on the motherboard? On the CPU?
If most likely this is done in software (windows) probably it won't matter since I'm planning to switch to linux.
What I want to avoid is buying it and being unable to use an 8TB drive.
2TB SSDs can be had in "single sided" versions where the chips are only on one side. At the moment I don't think there any any 4tb drives that aren't dual sided.
I'm going to assume that mini PC just doesn't have space under the slot for a dual sided SSD. Many laptops are the same way.