The cartridge shoul work on your MSX, but on MSX-DOS mode due to RAM.
When you say that it does not recognize any micro SD card, do you mean that it does not recognize it in the boot message or in recovery? Or do you mean you can't read its content from MSX-DOS?
Have you formatted your cards in FAT12 and 16MB partitions?
Here you can find a tutorial about how to do it
It's not recognized in recovery mode or in Nextor, and since neither recognizes it there's no way I can properly format it. I'll try formatting it through my computer and see what happens from there.
About the F700P:
Does it work after pressing RESET?
Does it fail on both slots?
Could you clean the cartridge slots?
I think I've found my sony h700p problem, when I start a cartridge in my sony then everything goes well, I can fiddle with the cartridge and the game, demo therefore continues to run.
But if I hit on my desk then the game, demo will freeze.
I used the flashrom version 1 and started pippols it works but only till i hit the table.
Only strange thing is when i dont do anything why does the scc+sd dont detect my sd in the cartridge 
I will try and fix my sony-h700p 
@ Apolloboy
Try your msx with a game cartridge, it should start, hit the desk near the msx ofcourse see what happens, not the most sientific way but hey. 
Try your msx with a game cartridge, it should start, hit the desk near the msx ofcourse see what happens, not the most sientific way but hey.
It works perfectly fine with games, no desk hitting required 
