It’s been done before, but by streaming data off an SD card or serial link. [Stephane] was determined to store everything on the Arduino itself, and thus the hack begun.

A maker developer has squeezed an Arduino onto an SD card. He was inspired by Intel’s Edison compute module and he tried to go one better. The result is the SDuino, an ATMega328P processor-based ...

[Flux Axiom] is using an Arduino Mega in his setup along with a cornucopia of sensors and all their data is being logged onto an SD card. All the code used in his setup is available in his GitHub ...

Piccolino is being marketed as the world’s first compact Arduino with integrated OLED, WiFi, SD Card together with +32K SRAM. “Piccolino is essentially an Arduino on steroids.

Meanwhile, the Arduino Mega is getting the same USB chip along with an ATMega2560 processor with twice the memory. Right now only 128K is available, but that's a software limitation and they're ...

SD socket, Real-Time Clock (RTC), 10-bit DAC, LiPo charger, LiPo regulator, direct USB code upload and debugging, Blink LED, mouse and keyboard emulator, etc…. Source: Kickstarter Share ...