The Wi-Fi dev board doesn’t come with a sd card slot installed, but there are a few addons. SD card and one that also includes GPS.
Here are the links:
https://www.justcallmekokollc.com/product/flipper-zero-wifi-dev-board-sd-expansion/7?cp=true&sa=true&sbp=false&q=false https://www.justcallmekokollc.com/product/flipper-zero-dev-board-sd-gps/3?cp=true&sa=true&sbp=false&q=false
Someone also found a merged MR to save to flipper’s sd card over serial, but still waiting on confirmation if it works or not. Here is the link to that: https://github.com/justcallmekoko/ESP32Marauder/pull/233
And forum post: https://forum.flipper.net/t/it-is-now-possible-to-save-marauder-pcaps-without-an-sd-card-attached-to-the-wifi-devboard/13255/12
There are a ton of add-on boards that I’m still looking at and exploring. Hopefully can bring a lot more details and information.
Found more info on the addon board that lets you add a rpi0w. Intended use was with pwnagotchi and it uses uart. There is also a companion app here: https://github.com/Matt-London/pwnagotchi-flipper
More on the intended use is here: https://www.reddit.com/r/flipperzero/comments/17t3ou7/raspberry_pi_flipper_zero_backpack/
Since it is just UART, can probably do other things with it as well, but I already have my rpi0w configured to run Kali + Bettercap automated scripts that I tweaked a bit from the pwnagotchi project which is mostly bettercap + ML + scripts and service files. I didn’t want or need the ML when I made mine, but the potential is promising with the backpack addon board.