TEAMGROUP is a name that comes up frequently in my Amazon searches — aside from that, I don’t know a whole lot about them. They appear to be based out of Taiwan and make products under the TEAMGROUP, T-FORCE, and T-CREATE brand names, and seem to have a variety of different microSD cards that they offer.
This particular card was sent to me by an anonymous donor by way of my Amazon wish list. (This is why the price paid shows as $0.00.) Thank you, anonymous donor!
These cards met all the criteria that I set out for determining what’s considered a name brand card, so I’ll include their results in the name brand bucket in my results. (Technically, one of the requirements I set out is that the package has a phone number for the vendor — which these don’t — but I’ll give them a pass on this one.)
On the performance testing front, things were…not great. Keep in mind, I’ve only tested two cards so far (with three more in the package), but results so far have been all over the place:
- Sequential read: All scores so far put this card in the bottom 3% of all cards I’ve tested so far.
- Sequential write: All scores so far put this card in the top 9% of all cards I’ve tested so far.
- Random read: All scores so far put this card in the bottom 11% of all cards I’ve tested so far.
- Random write: Scores here were much closer to average than the other categories…but were still below average.
On the endurance testing front:
- Sample #1’s first error was a single bit flip, in a single sector, during round 5. It has survived 6,817 read/write cycles in total so far.
- Sample #2 has survived 6,901 read/write cycles so far and has not yet experienced any errors.
- Samples #3-#5 are still in the package, waiting to be tested.
Overall — I think it’s too early to draw any conclusions here, but I’m not impressed by the initial results. It appears that this card was designed to prioritize sequential write speeds, but at the expense of everything else. However, I’ll wait to make any judgment calls until after I’ve had a chance to test the other three.
November 9, 2025 (current number of read/write cycles updates automatically every hour)