How to test fake SD card

Test SD cards

Sandisk SD Card

SDHC (MicroSD or so called TF) cards had been pretty cheap lately, no matter you are trying famous brands like Kingston or Transcend, they are cheap, however, there are a lot of fake cards out there, some of them are just using some brands that you never heard of, or some of them are faking famous brands like kingston.

Fake SD cards symptons and problems

FAKE SD cards (counterfeit SD cards) usually come with large capacity like 32GB or 128GB, and sometimes they are cheaper, however, the capacity is not real, once you place more files in it, older files disappear or just become empty or wipded out.

Once you get one of these fake SD cards, your nightmare never ends, you spend hours and hours to find out what's wrong and finally you got the idea, maybe this SD card is a fake.

How to identify Fake SD cards

It's not easy to identify fake SD cards because the newly written files are usually valid, only older files becomes bad, so it's not easy to proof that a TF card is fake manually.

Free fake SD card testing software

Today we are going to introduce a nice little utility to test the SD card, it is done by filling the SD card with random digits dummy files, and them verify what had been written, the SD card is only good when all files passed the test.

** before you start, make sure your SD card is empty, so all space can be tested.

1. download the software H2TESTW from https://www.heise.de/download/product/h2testw-50539

2. installl and launch it

SD Card testing software

3. Click write and verify and wait.