Amazon.com : Excelshoots USB Cable Works for Nikon D3100 Camera, and USB Computer Cord for Nikon D3100 + Excelshoots Card Reader : Electronics
EP-5A EN-EL14 to USB Type-C PD Power cable for Nikon D3100 D3300 D3400 D5200 | eBay
nikon d3100 compatible 15ft hdmi to hdmi mini connector cable cord plus hdmi male to hdmi mini female adapter with huetron microfiber cleaning cloth - Walmart.com
Adhiper UC-E4 Power Cable UC-E15 Replacement USB Charging Cable Data Synchronization Cord Compatible with Nikon D3100 D3100S D3X D40 D40X D50 D60 D70 D100 D700 D300 Digital SLR Camera(1M/Black) - Walmart.com