Not necessarily. Some Lexar "Value" series microSD cards are printed with thermal ink that fades over time. Use a magnifying glass and side-lighting (a flashlight at a 45-degree angle). If absolutely no text exists, it is likely a fake.
Due to their small size, the number is etched in tiny text on the back side. You may need a magnifying glass or a smartphone camera zoomed in to read it. On USB Flash Drives
: For SD cards and microSD cards, the serial number is typically laser-etched on the back of the card, often near the gold contacts or at the bottom.
Navigate to the official Lexar website at lexar.com , hover over the Support menu, and select Warranty .
Newly manufactured cards may take 30–90 days to appear in the online warranty database. If you bought a brand new release, the link might say "invalid" even though the card is real.
Most retail Lexar storage products feature an anti-counterfeiting label directly on the physical packaging.
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Lexar USB flash drives, such as the JumpDrive series, also have their serial numbers printed in specific places:
Internal (SATA/M.2) and external SSDs feature a large sticker containing the model number, regulatory symbols, and a distinct serial number marked as S/N . 4. Retail Packaging