This card is excellent for expanding storage on your smartphone. Its transfer speeds are are very fast hence it wouldn't slow your phone down. Only down side is that it is a bit on the expensive side.

Tested this out with inbuilt card reader of a laptop, around 10mbs write and 20mbs read, not the 30/30 stated but better than usb flash drives

At last: a good micro card that reads and writes quickly from a reliable manufacturer. With the supplied adaptor it can be used in a DSLR and the pictures shown around on a tablet.

Durable; Great Features; Great Picture Quality; Lightweight

Using it in my dash cam. With the extra cold weather, the memory card is holding up and not freezing on me. The adapter is convenient to view contents of the card on my sd card reader off the laptop. Would be nice if sd cards/adapaters come with cases. Not a deal breaker though

Does what it needs to do

Does not come with a carry case

Cost effective SD but write speeds are not fast enough to handle Full HD, standard HD and slower are fine, but it errors on Full HD.

I bought this card because of the sale price and the advertised speed. I returned it unused because of reports that GOPRO had changed their firmware to slow down transfer rates on GOPRO Hereo 3 cameras to eliminate some reported problems with SANDISK cards.

Not used yet. This is a gift for son and daughter upon request.

So far so good. The day I received it I slapped it in my new Galaxy S IV Active and without a hitch I now have 30+ more GB on my phone. All pictures, video and user installed programs on my phone are now installed onto this chip.

Great Value; Large Capacity; Reliable Performance; Writes/Reads fast

Tbd

Performs as it is supposed to.

All SanDisk SD cards I have purchased; so far; have performed equally well

They could be color coded in order to not have to be reading each one in the device

I did not think it would fit in my cell phone. Do to the fact I have been just buying from AT&T. The microSD fits and works great. I have yet to use the larger attachment.