after doing some tests between a generic memory card and this sandisk i am very disappointed. i bought the 32 gig class (10) card.i swore i picked "original packaging" but it was shipped with out original packaging... i will be returning this card for the following reasons:these tests were done using the sd card ports on my pc.my generic class (6) 32 gig card has upload speed of 22MB (write) and a transfer speed of 8.5.my sandisk i just bought, it has an upload speed peaking at 32MB (write) and a transfer speed of 6.5 to maybe 8.5 if im lucky.the write speed is ok, but why is the transfer speed so much more low. why isnt it at least 10MB if not 12MB if sandisk is typically so modest in their classifications?and whats the deal with the no classification marking on this sd card... i dont see class (10) anywhere on this card....amazon you will be getting this back!