** Australian Amazon review ** I bought this having already read the feedback from Amazon.com, which questioned the authenticity of the product. Those were other sellers though, Amazon Australia sells this one direct. I am fairly certain that this product is genuine, and I have used h2testw.exe to test the size to make sure it's accurate. I definitely got 128gb, and the read/write speeds were close enough. It inserts nicely into my galaxy s9 and copies data relatively quickly. You also get a microSD to SD adaptor which is handy. Happy with it so far.