Definately genuine capacity on all these cards. TESTED
This review us about the 32GB, 64GB and 128GB versions sold by this particular seller.

As there are so many fake cards being sold on Amazon and just about everywhere else one needs to be very careful when buying these. Usually if it seems that the price is too good to be true, it usually is. I thought around 10 for a genuine Sandisc 32GB Micro SD card, class 10 was about right seeing as the bigger cards are the ones most required for today’s devices the smaller ones are cheaper. I had also bought one of these exact cards from this seller before and I did a test and believed it was reporting a genuine capacity. I left a five star review for that.

The last time I bought one of these 32GB cards I tested it by transferring around 32GB of various sized files from my PC to the card, it copied just under 30GB so it was successful as the rest is used by the system. I posted a screenshot of it in order to show other Amazon purchasers, but at that time I had no real idea on how the ‘fake’ cards lied to the computer (and so to the buyer).

Since then I’ve found out that although the card will show you that all the files were successfully transferred to the card, they may not have actually been copied at all!

The real test would have been accurate had I tried to transfer them from the card back onto the computer, I didn’t do that so I may have been in error, I hoped I was not when I decided to properly test the new ones I’ve bought over this last two weeks. A new 32GB card and one each of 64 and 128GB cards for dashcams, all three from this seller. In case some people had bought one based on my review. This review is to replace that one.

Since then I’ve found out that it is in fact not the actual memory chip in these cards that reports usage and space to the computer, it is the controller chip that sits between the memory/storage and your computer, and it is this chip that is reprogrammed to tell the computer how much memory/storage the fake manufacturers want you to believe is in it.

So, I downloaded a free verification programme called with H2testw. This is the one that most places and sites will tell you is the go-to software for testing for fake cards. It can take a while as it is thorough, both writing and verifying files it filles the cards with, but it is worth it as it can prove a fake which will help in the return and refund process as you can give hard data.

With H2testw, I tested all 3 of these cards with the ‘Write + Verify’ option and they check out fully, ALL are indeed genuine 32GB, 64GB ans 128GB cards and in that respect are not fakes as far as capacity is concerned.

As for the manufacturer, well the printing on the cards seems very crisp, solid colours and not grainy, and the knock-out (for hanging on display shelves) is missing which is usually a good sign. I assume they are genuine Sandisc cards and not fakes, otherwise the manufacturer would have faked the capacity too.

So here are the details after I did the capacity test with H2testw:

32GB Card Results….
Test finished without errors.
You can now delete the test files *.h2w or verify them again.
Writing speed: 17.4 MByte/s
Reading speed: 19.2 MByte/s
H2testw v1.4

Here are thecresults of the test for the 64GB card:

Test finished without errors.
You can now delete the test files *.h2w or verify them again.
Writing speed: 62.2 MByte/s
Reading speed: 82.1 MByte/s
H2testw v1.4

I forgot to copy to clipboard the data for the 128, but it passed just as the two above did. I promise.

Do not be concerned with write speeds for the 32GB card, the multi card reader I used for that test was a USB 2 so it will be slow. I used a new USB 3 reader to test the 64GB and 128GB, hence the much better speed on the 64GB.