The product proved to be defective.
I often had to reformat it because it was not recognized by any device until it burned out.
In the end, they replaced it for me. Now we'll see if the new one will last.

Last summer I bought 3 pieces of this product for the mobile phones of 2 friends and myself. From the beginning, we were all very satisfied, mainly with the capacity of the card and the cost/performance ratio. After several months, my mobile phone showed that it did not recognize the card, which was fixed with a format, while around the same time, my friend's mobile phone had similar issues (corrupt files, inability to format the card, etc.). Eventually, the specific product was returned for inspection and replacement, as it was found to be defective. It was replaced with the same product, which works perfectly. I highly recommend this particular model and will definitely choose it again if needed.

After a year of use on my phone, I can no longer write or delete. Fortunately, I can still read the data to transfer it elsewhere.

Very good card, I have it for 2 years now, no problem,
with plenty of use on two different phones. Recommended.

Very good card. I have bought two for myself and one for my friend. I have been using mine for about a year and my friend for about six months and they haven't caused us any problems. They are very fast and reliable cards. My friend had also bought another card from a different brand that her phone never recognized, while she had only good things to say about the adata card. I highly recommend it.

I bought 2 identical ones on offer for my phone and my wife's. I first put mine, which stopped working after 1 month and I lost all the data (mostly photos). I assumed it was a random event and put the second one I had bought for my wife until I sent the first one for replacement. After about 1.5 months, it had the exact same behavior (unreadable and loss of all data). Both were replaced about a week ago. So now I have the third one installed and the fourth one as a backup. I hope the same problem doesn't happen again. Completely unreliable...