Review on High-Speed 256GB USB Flash Drive for iPhone/iPad/Android/PC - Blue, Efficient Memory Stick with Photo Stick External Storage by Troy Houston

First, the Lightning connector is so short that it can't be used with any phone in a case - at least 50% of the population. Second. Estimated time to transfer 1GB of data was 7 hours. Too slow for practical use when backing up or even transferring files. I go back to the SanDisk card. At least their published speeds are nearly correct. The declared 20 to 40 MB per second simply do not occur in reality.