This was a brand that I came across while browsing through AliExpress — but a quick search reveals that they’re pretty prevalent on Amazon too.
Surprisingly, this card did not come in a retail package — instead, it came in a simple plastic case. This is unusual, but not unheard of — I’ve had several other cards that came like this. At least these cases were designed to hold microSD cards.
These cards bear the Class 10 and U3 markings on them. All three samples performed well enough on the performance tests to qualify for the Class 10 marking; however, none of them performed well enough to qualify for the U3 marking. I’ll throw in my standard disclaimer here: my performance testing methods don’t align with the testing methods prescribed by the SD card specifications; it’s possible that they would have performed better had they been tested under proper conditions.
Note: I previously implied that these cards had the Class 10, U1, and A1 markings on them. That was a mistake — they bear the Class 10 and U3 markings, but they do not have the A1 marking on them.
On the endurance front:
- Sample #1 did make it past the 2,000 read/write cycle mark without encountering any errors — but just barely. It completed a total of 2,188 read/write cycles before becoming unresponsive.
Sample #2 encountered its first error after 1,516 read/write cycles. I finally declared it dead at the end of round 2,279, when the number of bad sectors reached the 50% threshold. Here’s what its progress graph looked like:
Sample #3 experienced its first error during round 876. I don’t know the nature of the error, but it affected over 5% of the sectors on the device in one round — but by the next round, those same sectors did not experience any errors. It continued to experience data verification failures over the next 2,700 or so read/write cycles; it was finally declared “dead” once 50% of the sectors on the card had experience data verification failures. Here’s what the graph of this sample’s progression looked like:
My conclusion: eh. These weren’t the worst performers in my collection, but it sure seemed like they were for a while. There are better options out there for the money.
June 11, 2025