Check and perform the following troubleshooting actions:
1)Your SD memory card capacity may not be compatible with the maximum SD memory card capacity of the device in which the card is used.
Check the maximum SD memory card capacity of the device for compatibility with your card. If you keep using the card in such an incompatible device, data stored in the card may be corrupted or lost or the card may malfunction. A device working with an SD memory card does not always mean a device compatible with the card.
2) Did you reformat your SD memory card in the device?
Our SD memory cards come pre-formatted when shipped from the manufacturer. Even so, some digital cameras, smartphones and other devices except PCs may require reformatting of an SD memory card. If the user guide for the device requires reformatting, follow the instruction in the user guide.
3) The SD memory card slot of the device may be in poor contact with your SD memory card.
Remove the card from the slot and re-insert the card into the same slot. Then re-insert the card into an SD memory card slot of another device.
If the troubleshooting actions above do not solve the problem,
a) prepare either a PC with an SD memory card slot compatible with your SD memory card capacity or an external SD memory card reader,
b) reformat the card using "SD/SD/SDHC/SDXC SD Memory Card Formatter" downloaded from https://www.sdcard.org/downloads/formatter/
When you reformat the card in a PC, use the specified "SD/SD/SDHC/SDXC SD Memory Card Formatter" downloaded from the website above. Do not use other format software. If you reformat the card using standard PC format software, the card will not be properly reformatted.
If the user guide for the device requires reformatting of an SD memory card, reformat the card, already reformatted using "SD/SD/SDHC/SDXC SD Memory Card Formatter", in the device.
If the troubleshooting actions above do not solve the problem, contact KIOXIA Customer Support.