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MK3S stopped reading the memory card  

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garryp4
(@garryp4)
Active Member
MK3S stopped reading the memory card

I have been using the memory card that came with the printer since it arrived. Yesterday I printed one part to make sure it would work, then simply added more instances in the slicer and transferred it to the card. When I went to print, the printer did not see the new file. I could see it on my PC. So I formatted FAT32 adn tried again. The printer still does not see any files on the card. I tried a second brand new card and got the same results. Then I flashed the new firmware. Still no files on the card. The printer see's when the card is inserted but just cant see the file. 

A search found I am not the only one this happened to. https://help.prusa3d.com/article/sd-card-not-working_2095. However I already did a complete format on two cards with the same result. It just failed between prints.

Anyone have any ideas?

Posted : 02/01/2026 9:10 pm
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