FAQ: If I Download A New Program To The Micro:Bit, Will It Overwrite The Previous Program?

Last updated - November 12, 2026

Yes—because the micro:bit only stores and runs one program at a time, flashing or copying a new program onto the device will overwrite the existing one. Simply downloading the .hex file to a computer won't affect anything until it's actually transferred to the micro:bit, so just make sure to save a copy of the old file first if needed for later.