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How to Identify a Used SD memory card?

Last response: in Memory
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September 27, 2013 2:28:03 PM

Hello everyone,

I recently bought a "new" SD Memory card (lexar pro. 32g 400x) from Future Shop, and after I took out the SD card, I noticed some scratch marks on the pins. From what I know, the scratch usually appears after inserting into a card reader.
Does anyone know if the scratch mark is an indication that the card has been used? Are there any ways to identify if the card has been used or not? I'm not a big fan of 2nd hand products, especially memory cards, it could contain potential virus.

Thanks for the help.




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a b } Memory
September 27, 2013 2:32:02 PM

In order to be tested, it would have to be inserted so scratch would not be indicative of anything necessarily.
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September 27, 2013 2:35:10 PM

JackNaylorPE said:
In order to be tested, it would have to be inserted so scratch would not be indicative of anything necessarily.



yea, i thought of the same at first.....but I remember some of the SD card that I bought before had really clean pins.....hmmm not sure though.
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a c 80 } Memory
September 27, 2013 3:00:11 PM

You can download the file recovery software to check the SD card to see there are something in it or not. Like the EaseUS Data Recovery Wizard Free. http://www.easeus.com/datarecoverywizard/free-data-reco...
Or other something like the hard drive software, like CrystalDiskMark.


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Best solution

September 27, 2013 3:52:58 PM

I currently work as a QC / Counterfeit Mitigation Inspector in the electronic component industry. I inspect integrated circuits (think microchips), but also have seen more than my share of new, used and counterfeit SD cards.

While the pads may have *some* wear, typically the wear from testing is very shallow and along the same plane. Multiple lines (scratches) may indicate previous use.
If you tilt the SD card to the light, so there is some glare on the plastic surface, you may notice some scratching near the edges of the card that could very well indicate previous use also.

If the card was in retail packaging that had not been tampered with I wouldn't be too concerned, although even Retail shops (and franchised distributors) can become victim to counterfeit packaging with either used or counterfeit product inside.


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September 28, 2013 7:50:23 PM

Thank you all for the help. I went back to the store and asked for an exchange, they kindly accepted. One of the customer service rep said that it's normal to have scratchs on the pins, even from a retailed package. The exchange SD card I got also had scratchs on the pins.....but less noticeable. I guess thats the way with SD cards.
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