1.Connect wired & wireless mouse to your iPhone/iPad (Need iOS13 and enable the Assistive Touch on your iPhone or iPad Settings.)
2.For iOS13:Photos app will not pop up,you can find the photos from Photos app .Find the information you need from Files app.
3.Only when the system version is IOS13 or higher,the external USB flash Drive can be connected. The supported format is "exfat" or "fat32".(Tips: Please backup your files before formatting to avoid losing them)
4.If the iphone to usb adapter cannot recognize your iphone/ipad (or disconnect it). It may be that the external device needs a large current, so please use a 2A power charger to charge the usb adapter while transmitting.