Auto recover will save your file in a separate space every so often. This is adjusted using the slider. This feature is useful when working on a complex arrangement where a power outage or program crash (unlikely) or freeze by the operating system (it happens) could force the program to quit and you might lose your work. If you are working while power-outs are happening, well, turn this on. Please don’t run your embroidery machine when the power is unreliable, as brown-outs are not good for them.