Review on 📸 Efficient MicroSD Card Breakout Board+ (ADA254) by Adafruit by Bart Schwalbe

While there are cheaper MicroSD readers out there, the Adafruit model offers excellent support. Based on general Arduino ignorance, it didn't take long before my Uno could read and write data to/from microSD cards. Less than an hour. Add another hour to figure out how to sync it with the Mega 2560. I ran it twice continuously for three days, recording environmental data, opening and closing files about twice a second (the code wasn't optimized very well). at the time) and he hasn't had the hiccups yet.