Works with my GoPro Hero 4 Silver.Certainly not the fastest card out there but then - I just needed a card which can support 1080p @ 60fps. This fit the bill well. Works fine.If you are a gopro user - then this card is a cheaper alternative compared to top shelve cards like Extreme/Pro grade which offer 90 mbps. The 566x claims 85 mbps. Now granted that its just read speed & not write speeds. But it suffices.The 2 add-on card adapters are a great addition at this price & is very welcome in my opinion. Phone users can settle for the cheaper class 10 cards as well & those will work fine. This one is a notch higher in terms of performance.

Received a faulty card.I have been using this in a camera. First time it stopped detecting in the camera, I tried to check in Windows and Mac but in both laptops it was not detecting. I tried again, this time formatting the card from the camera itself (as the camera manual suggests) and used it on a trip. Midway through the trip, the card stopped detecting again. Switched on the camera and error message. Tried a recovery software but it was only able to recover 40 jpgs out of a total of 26GB of pictures. Some jpegs are garbled and not a single RAW was recovered. Fancier recovery softwares cost 4x what the card costs so not venturing there.Amazon have refused to process a return since it is out of the window and was not "defective" out of the box. Pursuing an RMA with the manufacturer.For the record, other SD cards are working fine in the camera.UPDATE: I got the card replaced at the Strontium Service Center. Experience was painless, to Strontium's credit. Changing review to 3 stars for this.

Being a photographer i chose my memory cards carefully. This product is good. This is my third memory card from strontium. And they've all been excellent. It gets delivered with an sd card adapter and a usb adapter which are both really useful and other big brands like sandisk, transcend, etc don't provide you with both. They just give an sd card adapter that too not with every card.I used this card with nikon d800e and it worked well. That should tell you that the speed is as advertised. It didn't deliver results as good as the strontium nitro plus, but that's just because the nitro plus is a faster card.On my phone, it performed flawlessly.If you're looking to expand the storage of your phone, tablet, digicam or even a dslr like 5d mark iii, thus card will deliver the goods.Had issues with delivery but the card is good.

Duplicate product, I didn't realize it initially but later on when I used the product it started giving problems. I was not able to write anything on sd card and in my case my camera photos storage was in sd card and because of that I was not able to click photos. I formatted it multiple times but no help. Now when I actually formatted in windows, the actual space it showed me was only 16 gb instead of 64 gb and because of that I was facing the problems. Please don't buy this. It's just a bulls*** product