PSP Go M2 to Micro SD Adaptor. Looks like there is another person making these. And these are plug and play compared to the other ones. : r/PSP
I made a PSPgo micro sd card adaptor, and so can you! Maybe, well, probably not, it's not easy. : r/PSP
Micro SD Memory Card to Psp GO Memory Stick Adapter Micro M2 - Etsy Australia
Peter McDaniel on Twitter: "Upgraded my #PSP Go tonight. I really didn't want to lose anything on my 8GB card but I didn't want to pay upwards of $40 just for 16GB.
DBWBP.com - PSP Go Micro SD card slot modification
I made a PSPgo micro sd card adaptor, and so can you! Maybe, well, probably not, it's not easy. : r/PSP