Instruct: Classify Amazon reviews into positive or negative sentiment
Query: U3 feature not revealed

The U3 launchpad does not work with some specialized data loaders (Aircraft MFDs). I was trying to buy non U3 drives and there is nothing in the Naming of this product that reveals it is a U3. When I got the product I found in the small print that it was U3. The process provided by Sandisk to remove U3 just doesn't seem to really work.