VIOFO Support Center

How to test your microSD card?

1. Please format your microSD card first. See via

2. Download at the bottom of this article.

3. Open h2testw, select your target and choose write+verify.

4. Waite until the test is finished and keep a screenshot.


It is important to choose a MicroSD card with good quality. We recommend choosing a microSD card with high endurance and UHS-U1/U3 or above class.

Bad-Quality microSD cards have short life endurance and may cause various problems when you use your dashcam. Most of the recording issues are caused by bad-quality microSD cards like randomly stop recording, video corrupted, etc. 

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