Please tell me if this is genuine or fake.

Can you please confirm if the product is authentic or fake. It’s 256gb but my phone shows it as 268gb.

Hi @Sajidkhandsk ,

Based on the picture shared by you, we regret to inform you that the memory card with the serial number (MMCAX64A9T25U3-T0) is not an authentic SanDisk brand retail product. We would request you to contact at your place of purchase for the replacement of this card.
Please contact the SD Technical Support team for best assistance and troubleshooting: