UHS SD card as in the 27 inch iMac provides 300 mbps performance. This is interesting as you could use it as a boot drive. It's slower than modern stuff but still usable and far more usable than the legacy 100 mbps cheap cards.
The other thing is only 16 and 32 GB options for the M1X MacBook Pros.
The other thing is only 16 and 32 GB options for the M1X MacBook Pros.