The SparkFun OpenLog can store, or "log", huge amounts of serial data and act as a black box of sorts.
The SparkFun OpenLog with Headers can store, or "log", huge amounts of serial data and act as a black box of sorts.
The SparkFun Qwiic OpenLog can store, or "log", huge amounts of serial data and act as a black box of sorts all over I2C.
The gator:log is the perfect data logging tool for your next experiment.