MicroSD cards are designed for slot-equipped legacy mobile phones and can hold a maximum capacity of 2GB. Today’s microSDHC cards are available in 4GB, 8GB and now 16GB, are ideal for newer mobile ...

I am doing this exact thing, with the exact micro SD card in the Sandisk adapter. the only difference is I didn't format it to APFS first, and I have an M1 14in MBP, and, currently running Monterey.

The x16 Gen 3 PCI Express add-in card can hold four x4 Gen 3 M2 units of up-to 10cm. If you worry about power, not an issue here either, as the card is fed with a 6-pin PEG power connector.

At any rate, Best Buy Mobile and Verizon Wireless stores will be your go-to place for either one, though we'd be prepared to shell out $99.99 (16GB microSDHC) or $129.99 (16GB M2) when they land ...