Other Sandisk products work better.
343353
Hard to believe it's really USB 3, given slow transfer speeds. Other Sandisk products work better.
2105448
Works fine, but write speeds are slow. shooting in burst mode met with huge delays waiting for the camera to write to the SD card.
1149032
I have had a SanDisk before and loved it.  I use it at the gym and for taking walks.  This one works the same way but the sound comes and goes like waves and at times i cant hear the music at all so that is disappointing.
2456655
Its served me well for now but the storage as its mention'd isn't as given when plugged in and used.
Typical of SanDisk, low cost, alright quality.
3484150
Samsung is the nicest looking card IMHO but it's performance is meh for a name brand. Slightly faster than the SP but for a $1 more you can get more than twice the write/read speed with the PNY or Sandisk. I did this test using the Black Magic disk test of various SD cards I had in my camera bag.
2441825
Doesnt work with 64gb sandisk micro sdxc card. when I insert the card into the reader my pc promptly freezes until i unplug the reader.
4203486
After one year it stopped working with Rhapsody - it was one month short of warranty and SanDisk will do nothing. I have 3 older models (3 years older) that work just fine still. It's a defective product - and this was replaced after one month at the original purchase!
4464549
Is it just me or is it really that slow? Had a SanDisk 64G USB3.0 earlier it was markedly fast (though overheated on occasions).
44370
I have tested this SD card in my Panasonic and Kodak cameras and it is not faster than the standard Sandisk SD cards.  I tried taking as many pictures as I could in a minute with the Ultra card and the standard card and the speed was the same.
  My Panasonic camera also has a "burst" mode.  Testing in this mode also showed no difference between the two card types.
  Next I tested the write speed on my desktop computer.
  Standard SD card  3.45 MB/second
  Ultra  SD card  8.25 MB/second
So the Ultra card really is much faster than the standard card.  However for some reason, I didn't see any improvement in my cameras.
Thanks
John C. Briggs
125094
I got this for my 60D.  it doesnt keep up with writing and i film in 720p.  The camera buffer fills up and stops recording.... I don't use this anymore unless im shooting pictures, but I just leave it at home in my desk drawer either way.  my sandisk extreme pro has yet to be replaced by anything else
2160785
This is  sandisk SDXC from Amazon with write issue. after a while it cannot be written/formatted anymore. It never happen on my other SDXC brand. Not sure if Amazon will inspect the quality control of this product or not. But please avoid this type of Sandisk. Amazon, you should refunded all customers who bought this Sandisk.
130192
I've bought other brands of MicroSD to SD adapters before. Some adapters are so tight that once you stick the MicroSD in, it is extremely difficult to pull them out. I suggest the SanDisk adapter because you won't have to deal with this issue. Avoid generic brands from China. The slots are usually tight. Buy this instead.
1426760
I would use a different brand if you are going to use this with any samsung phone.  Samsungs and sandisk have a known issue that can't be fixed and Sandisk knows this.  On  the forums, there is no workaround other than replacing it with a different brand.

Samsungs randomly unmount the card and flaim there's no memory card in its slot, yet you can clearly see the contents when you insert it into a pc or mac
3550399
Well priced but doesn't play well with the SD cards I tried. A little bit of a bummer there. Also, susceptible to overheating.
1438807
I was looking for a cheap drive and was OK with 2.0 speeds but the write speeds at 4.5MB/s on this are much worse, about what you get with a cheap give-away drive.

Read speeds are a decent 35 MB/s. This drive would be OK if you rarely wrote to it and mostly used it for reading -- or you don't care about the write speed.

This is the last SanDisk drive I will buy, I have 3 and they all suck on write speeds.
2814341
Not what was advertised (SANDISK) unlike others I got some other brand but not San Disk.

More importantly does not work (Windows7 - not that it should matter)
1094156
I've got a few of the 64GB size and have been pleased with them. I was thrilled to see the 128GB become available and bought 2 of them. Both of them make rattling noises that the other ones never made. Don't know what it means, but it can't be good and is unacceptable. How can these pass quality control? Is there any quality control at SanDisk?