hi Alan, thanks but, really, I just want to just have a huge harddrive for pictures instead of the (seemingly) tiny CF cards. It's time.
It is hard to understand what exactly you want.
You write harddrive, which is a term usually referring to mechanical spinning drives. As you also wrote SSD shortly after in your original post, I guess you only meant to write SSD. No need to add drive to that, the D stands for drive.
Now, SSD also come in two typical form factors. As you mentioned an Atomos, you likely want a 2.5" SSD. The alternative would be M.2, the slim strip type you'll find in modern Notebooks and some PCs.
So what I got from your writing is that you want a suggestion for a stills camera that somehow directly interfaces with a 2.5" SSD? If so, what exactly is the benefit you expect from this?
I am not aware of any such camera. Also, I think it offers no advantage over the current direction stills camera storage is headed in*. CFexpress cards both give you big storage capacity (you can already buy 1TB ones), and have the potential for far greater speeds than you'll achieve over SATA with 2.5" SSDs. So they are better suited for storing large amounts of data, as they also allow you to access and transfer all this data in reasonable times.
So I'm not sure I understand your intentions clearly. Maybe you can elaborate.
*Edit: The current prices for large amount of fast storage are of course quite excessive compared to equivalent PC parts.