D. Cahill
I wanted some extra space in my new mobile device so I chose this SanDisk microSD card.  The card has worked perfect so far in my HTC One M8 for several weeks so far.  The performance of copying files from my computer over to the phone is adequate.  The performance is likely limited by the phone's USB 2.0 interface so I haven't done any tests with the card connected up to a dedicated SD card reader.