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
mathieulh@mstdn.social on Twitter: "I finally managed to install the Micro SD storage mod in one of my psp go c.c. @kouchan66 it cost me one and a half tape as well as
Max memory card size for GO - wololo.net/talk
DBWBP.com - PSP Go Micro SD card slot modification
Sony 8GB M2 Card Memory Stick Micro 8G for Sony Ericsson Phone & PSP Go | eBay
PSPGO M2 Memory Card Dummy Adapter on Sale - Hackinformer