Ethernet Nano W5100 Ethernet Shield LAN Network Module Board Micro-SD Support TCP UDP for Arduino V3.0 R3 UNO Mega 2560 One: Amazon.com: Industrial & Scientific
Arduino Ethernet Shield | Arduino Documentation
Use an Arduino to Read and Write Files from an SD card
Ethernet Shield W5100 For Arduino Main Board Rj45 Atmega 328 1280 Mega2560 Network Expansion Board Module With Micro Sd Slot - Integrated Circuits - AliExpress