ASK NC

Is there a Nas that I could start small and build upon

It's for video editing, so I'm thinking of approx 30GB
(to start with)

with x3 thunderbolt 4 or 10gbit (Mac studios)
and be able to add extra as needed

Thinking of a reasonable starting NAS

I would recommend XS series models. These NAS will be powerful enough to sustain 10gbe speeds to multiple computers
https://www.synology.com/en-uk/products?...n_m2_slots
On a Qnap side, you may consider 1688x model with a Thunderbolt card.

I hope this helps.