Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Viking CF128M Incompatible with Nikon 775

I purchased this item to use with my Nikon 775. I checked with the Viking Configurator which indicated there was no problem. When I attempted to use the card, however, my camera warned the card could not be used. The card works fine in my older HP C30. I gave the item 2 stars instead of 1 because the card worked in my older camera. I sent an e-mail to Viking but got no response. By the way, Amazon's policy on returns is a restocking fee if the package is opened. How are you going to find out something does not work unless you open the package and try it? Buyer beware!!!!