Red light on s9j

[mikeywith]

I'm sure those cards that do not work are fake

Ok maybe that is one of the issues but it is not everything, i recall testing some of the cards by sending music/movies files to them and was able to view them on my phone.

The fake cards are usually fake in volume, an 8gb shows on your PC as 32gb, but then, the firmware is pretty small, so even if the volume is fake it should still be able to handle the file.

It could also be the card reader, the copying process, it could be anything mentioned in the post above this one, just one advice, you find a card that works, label it and save somewhere safe.

[Artemis3]

Look its simple, Bitmain/Zynq is cheap right? They are not going to put a chip in there capable of handling SDXC or more, when there are surplus of obsolete SDHC or older available. This is why 32g is the limit. BUT, there are 32g SDXC cards out there, which will, of course, not work. That is why they wrote that 16g max thing. More than 32g will absolutely not work, the border from SDHC and SDXC is right at 32g. Besides from their point of view, customers are almost never ever using the micro SD slot...

And of course this is disregarding the fake ones, which just complicate matters. Smaller sizes tend to be less faked. Braiins OS only needs 128m so its a huge waste of capacity anyway, get the smallest size you can

[MinerMEDIC]

Look its simple, Bitmain/Zynq is cheap right? They are not going to put a chip in there capable of handling SDXC or more, when there are surplus of obsolete SDHC or older available. This is why 32g is the limit. BUT, there are 32g SDXC cards out there, which will, of course, not work. That is why they wrote that 16g max thing. More than 32g will absolutely not work, the border from SDHC and SDXC is right at 32g. Besides from their point of view, customers are almost never ever using the micro SD slot...

And of course this is disregarding the fake ones, which just complicate matters. Smaller sizes tend to be less faked. Braiins OS only needs 128m so its a huge waste of capacity anyway, get the smallest size you can

I have already explained this on page 1 exhaustively with documentation. You’re  pretty close tho.