[SloopJon]

The picture shows a 2230-ish drive. I would be somewhat surprised if the 8TB option in the M4 Pro is on that module. The different chips may do storage differently.

[haswell]

It’s visually similar to a 2230, but does not appear to actually be a 2230 if you look closely at the pins.

[jsheard]

Correct, it's not a 2230. Standard NVMe drives combine the NAND and controller onto a single module, but Apple Silicon machines have the SSD controller built into the main SOC, and the SSD module is just the raw NAND chips.

[SloopJon]

I searched for Mac Studio SSD upgrades, and I do indeed see modules that look just like the one in the picture. Not cheap.