[donatj]

Hmm… I recently bought a modern original PlayStation memory card that saves to SD.

The first SD card I bought just would not work with it no matter what I tried.

Support actually had me download the “SD Memory Card Formatter for Windows” from this site and reformat my card. Did not fix the issue. I ended up just buying a new SD Card which did fix the issue.

At the time it just felt like support was grasping at straws and wasting my time, but sounds like maybe not? Very curious. I have always just formatted my cards with Disk Utility in macOS.

[Sephr]

You may have purchased an SD card with a fake/spoofed capacity, which can cause all sorts of issues. This is apparently a pretty big issue with stores like Amazon that comingle inventories from multiple vendors.

[donatj]

I would bet money it was a Microcenter store branded one, the ones they have at the checkout counter. They are what I almost always use and they have never given me issues before. I am also sure I have thrown it into something else at this point though it is difficult to say what.

[FreeFull]

Maybe the memory card uses SPI to communicate with the SD card? The SD card standard mandates SPI support, but some SD cards are non-compliant.