SD Card
SD cards fail often.
If you can’t read an SD card on your printer try it on your computer. If you can’t read it there it probably has failed.
If you can read it on your computer, does it meet the requirements your printer manufacturer set. Quite often the manufacturer has set a limit on the size of the card. Often the format of the SD card must be FAT. Have you formatted the card properly?
You can try to reformat a failed card. I would toss any card that failed and would certainly toss one that failed twice.
Try a different card in the printer.
If multiple cards fail in the printer, and they meet the manufacturer requirements. I would suspect a problem in the card reader for the printer. Often the reader is soldered to the motherboard in the pringer and can not be fixed/replaced by a normal person.
Putting cards in/out can cause the reader to fail. You can get a reader that plugs into the reader on the printer. Then if the reader fails you can cheaply replace it, rather than an expensive motherboard. They sell SD card readers on a ribbon cable that plug into a micro SD card reader to allow you to use full size SD cards. Even if you use one of these the SD card must meet the requirements set by the manufacturer of the printer.