Cat Daddy
The advertisement calls this card a "class 10" card however I was not able to get "class 10" speeds with this card. SD cards seem to be MUCH faster at read/write then microSD cards. I get about 10MB/s write speed when copying a file to my SD card through my phone USB cable. I get the same transfer rate when in an adapter. These small memory cards seem to be very limited on their write speed. Also, this card did heat up some when transferring to it for a long period of time continuously but not too bad...just warm. The read speeds seem to cap out at about 18MB/s but I did see 25MB/s on small files. One thing to note, and this may be by design for this particular card but, this card is super fast when transferring small files but slow at big files so you'll see slower write speeds the longer you write to it with larger files whereas smaller files zip along one at a time at that 10MB/s. I was getting 8.6MB/s when writing a 4.6GB movie file to this card. All in all, this is an excellent card and beyond worth the money for what you get. I love it for my EVO 4G LTE and my previous phone the EVO 4G. The only reason I gave it 4 stars is because it did not perform as advertised at 30MB/s. However, if you are thinking of getting this memory card for an Android phone and don't want to pay big bucks, this is your card. Stop reading and buy it, I'm glad I did.