The new iPhones are more powerful than ever. With USB-C connectivity, you can now attach a whole host of devices to your phone. Thanks to Diskio, you can now analyze the speed of attached devices. It can give you reading speeds (MB/s) of internal and external storage solutions.
To get started, simply select the internal/external storage location, customize parameters, such as test file and chunk size, and you are set. Diskio can be used with USB drives, SD cards and a whole lot more.[where to get it]