The Industruino works the same way as an Arduino so please look for Arduino examples for what you want to achieve.
Industruino specific settings are explained at https://github.com/Industruino/libraries#ethernet
You can indeed save your data on the SD card in the Ethernet module https://github.com/Industruino/libraries#sd-card - the standard Arduino library 'SD' works (only change 'Serial' to 'SerialUSB').
Please try to give a substantial answer. If you wanted to comment on the question or answer, just use the commenting tool. Please remember that you can always revise your answers - no need to answer the same question twice. Also, please don't forget to vote - it really helps to select the best questions and answers!