In preparation for my up coming trip to Indonesia I ordered two SanDisk Extreme SDHC 16GB Cards with 45mb/s, but what I received was not what I expected.
I wanted to order them from trusty Amazon. Unfortunately only Marketplace seller had the cards available (at least for an appealing price). Blinded by the Amazon appearance I ordered these two cards without realizing that they’d be sent from HongKong. After approximately a week I received my package with the two cards. Everything looked good from the outside, but after opening I realized something odd. All my other cards have SanDisk engraved on the back, moreover the case wasn’t translucent like my other cases. I found that quite odd, so I did an internet research on fake SanDisk SD Cards.
The new card is on the left.

The information on the net fueled my fear of having bought two fake cards. But they also explained how to check the read and write speeds to confirm if they are fake or not. Using the Blackmagic Disk Speed Test I checked the read and write speeds of the new cards, and surprisingly the cards had the promised 45mb/s specs. Another test was the H2testw (windows) or the F3 (Mac). These tests basically fill the card up with 1GB files and afterwards read and check the written files for corruption. On mac you have to do some Terminal command magic, so go over here for some detailed instructions. So in this test my cards could be filled up completely and all files were ok (if it would have been a fake card, you might only be able to fill up 1GB instead of 16GB or end up with a bunch of corrupted files).
All these test were more or less proving that the card is working alright, but I couldn’t shake of the feeling of having a fake card that might fail on me during my trip or even during a job. A working but fake card could have been build with cheap parts that might fail after a just a couple of times use (I’m not saying a SanDisk or other big brand card is fail-prove, but at least you have some assurance that they have some quality control).
So I emailed SanDisk for a conclusive confirmation on these cards. I send them pictures and the serialnumber of the cards, asking on information if some SanDisk cards do not have the engraved SanDisk logo and even use completely different card cases. Their answer was as followed:
“Thank you for contacting SanDisk Technical Support. It is our goal to make sure you have all the resources you need to get the most from your product.
We have reviewed your case and can inform you that your card is an original SanDisk product. The variation in the card case is due to manufacturing reasons.
Thank you for your kind cooperation and for your trust in SanDisk products.”
To be honest: This was unexpected, but very good news at least for me and for this case. I have purchased original and working SD-Cards. The bad news is, that it is probably really difficult knowing if you purchased an original or a fake SanDisk SD-card without actually doing the read and write tests. I guess the only way knowing for sure, is to buy of an authorized SanDisk reseller for a higher price.
Any of you had the same or a worse experience with fake cards? Maybe with a different brand? Moreover which card brand do you prefer and why?