Video shows 32 GB iPhone 7 is 8 times slower than 256 GB
A four-minute YouTube video shows a series of speed tests being performed on the 32 GB and 256 GB variants of iPhone 7. The 'PerformanceTest Mobile' app showed that the 32 GB iPhone has a storage write speed of 42 MB per second, which is over eight times slower than the 256 GB version's 341 MB per second.