Beware of fake cards. The capacity shown on fake cards can be modified to show a size greater than what it actually is. Ex. A fake 256GB card having only 32GB instead. Some unknowing person could use the card without knowing it was fake and find that the data was corrupted when it got past 32GB or encounter a very very slow transfer rate past a certain point.
To check if the card you bought is legit or not use FakeFlashTest (fast) and H2testw (slower but thorough). This will delete the content on your card so backup whatever you have before using it.
The speed and pictures I got from my legit 256GB card are attached. Your results may vary. The product code is edited out for product support issues.