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Upgrading an M4 Pro Mac mini's storage for half the price
A few months ago, I upgraded my M4 Mac mini from 1 to 2 TB of internal storage, using a then-$269 DIY upgrade kit from ExpandMacMini. At the time, there was no option for upgrading the M4 Pro Mac mini, despite it also using a user-replaceable, socketed storage drive.
The upgrade process itself is straightforward (if you've ever worked on laptop hardware before, at least), though removing the rear plastic cover (which also has the power button attached) is a bit annoying. And if you're not careful on that step, you'll not only scratch the aluminum (and maybe crack the plastic bottom), but there's a good chance you rip the fragile (and tiny) power button connector too! Speaking of standards... you have to do a full DFU (Device Firmware Update) restore, because unlike conventional M.2 NVMe storage, the M4 uses a proprietary connector, a proprietary-sized slot, and splits up the typical layout—the card that's user-replaceable is actually just flash chips and supporting power circuits, while the storage controller (the NVMe 'brains') is part of the M4 SoC (System on a Chip).
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