microsd problem

[orabeidm]

Out of all 4 memory cards at home, only one from Kingston works. For some reason, the others don't work. Either they can't create files, or the card fails to mount, and so on. Why? No idea. I've tried formatting them (FAT32, exFAT, MBR, superfloppy, different cluster sizes). How can I diagnose the problem?

[xyzz]

What are the other card brands, can you include a high quality closeup picture of it?

[orabeidm]

So far, I've tried:

An unnamed 512 MB card from another memory card project
An unnamed 8 GB card from a used PSP that came into my possession
A fake Kingston 8 GB card with the correct capacity (most likely a rebranded one)
A genuine Samsung card, which is not new but fast and works very well everywhere
A genuine Kingston card, which is the only one that works in the SD2PSX
I recorded a video for my friends about this. I'll upload the video to YouTube and share the link here.

Additionally, I redesigned the case a bit, making the screen sit even lower, and the card became even thinner. However, I'll probably upload the model to my GrabCAD later.

https://youtu.be/H8r_RLhS-f0
https://youtu.be/H8r_RLhS-f0
https://youtu.be/H8r_RLhS-f0

[orabeidm]

The situation is getting more interesting! I cloned the Kingston flash drive with PSP games using MiniTool Partition Wizard, which was working, onto a Samsung flash drive that previously didn't work in SD2PSX. I did this to swap them and, for testing purposes, inserted the Samsung flash drive into both the SD2PSX and the PSP. Surprisingly, it worked everywhere this time, even though it refused to work before. And I had tried formatting it in all possible ways!

[orabeidm]

this is rather an exception to the rule, it also does not work on other flash drives

[orabeidm]

I tried a new 64GB Kingston card and another 8GB unnamed Chinese card. Both work. According to AxoFlashTest, both cards show Class 10 speed. I think the issue is related to the card's speed. However, my friends have it working with Class 4 cards and even very old Chinese cards with 128MB capacity in FAT format.

[opssemnik]

I wonder if the non working cards were previously in the GPT partition layout rather than MBR, this would explain why a sector copy worked, and why formatting didnt