Chosen Solution
How about the NAND SSD, is it replaceable with an SSD that has more Storage?
Those are not raw NAND chips, they are one-chip SSDs similar to eMMC, but Apple proprietary. Apple uses several chips to set up a RAID configuration with the Mx chip as the storage array controller, presenting to the OS as a complete volume. The Mx seems to also need to access additional data not available in storage mode to get system configuration data, like serial numbers, storage configuration, board firmware and so on to be able to boot. Replacing the storage chips on M1 macs is possible, but requires chip taken off a working Mac and install them in the exact order as the original. From what I remember a NAND programmer is also needed to re-write serial information
There’s no SSD, just a handful of raw NAND chips soldered to the logic board, thus no, nothing that can be replaced.
For the M2 Macbook Air specifically, it is currently unknown whether it is possible or not. However, we can draw some conclusions from previous models of iPhone and Macbooks. Such upgrades are very much possible on the M1 Macbook Air. Similar “impossible” upgrades have also been achieved on every currently supported iPhone model. There are a great many naysayers who think that board level modifications are too scary or too dangerous. People like that likely hold what is called a fixed mindset, where they don’t think that things can be changed. Those with growth mindsets, believe that things can change and become better if effort is put towards making things that way. To counter their points, technicians in China have been doing it for a long time. Here are just a few links to people who have achieved such things. https://youtu.be/0ecSzeqYX3E Translated Version: https://www-chongdiantou-com.translate.g… Original untranslated: https://www.chongdiantou.com/archives/73…
