Review on OTG Adapter 3 in 1 Memory Card Reader, USB 3.0 Reader with OTG Function for PC/Laptop/Cell Phones/Tablets/Car/Computer - SD/TF/Micro SD/MMC Card Compatible, Silver by Kevin Campos

The speed is not impressive. It's listed as USB 3.0, but don't expect to use that. The listing doesn't make any speed claims, so maybe it has a 3.0 connection and something else is causing the slower transfer speeds I've seen, so this may not be a false claim. USB 3.0 doesn't necessarily mean you'll get as high speeds as the connection allows if the device can't use it. This one doesn't even come close. I tested it with a new Pony micro SD card, which isn't really high quality or lightning fast, but it didn't matter. The transmission speed was about half that of the card. Burning a 3.65GB MKV file took about 4 minutes, but it took about half that time with another adapter that I found reliable and fast. In fact, it worked only slightly better than the old Dell USB 2.0 Micro SD adapter I tried. Shortly after I received it, the lid came off when I was pulling it out of the port. (see picture) It didn't get stuck and I used normal force. Poorly. I like the adapter's swiveling design with 3 different connection types, but due to the slow data rate and poor design, I can only give it 2 stars.