Adapter Cable Micro USB OTG for Samsung Galaxy S7 SM-G930, for direct transfer of photos, videos and other content on an USB flash drive without PC : Amazon.co.uk: Electronics & Photo
Samsung Galaxy S7/S7 Edge MicroUSB / USB OTG Adapter - White
Samsung Galaxy S7 & S7 Edge USB OTG support test - YouTube
Samsung Galaxy Tab S7 FE USB 3.1 Type A to USB Type C OTG Adapter Converter
Samsung Galaxy S7/S7 Edge MicroUSB / USB OTG Adapter - White