Answer:
A CD.
Step-by-step explanation:
A compact disc (CD) is a small digital-optical disc that is used to store computer data using a laser beam.
The compact disc is able to store digital data because it is made up of a polycarbonate (a tough-brittle plastic) with one (1) or more metal layers.
Hence, the data stored in a compact disc cannot be scrambled by a magnet because it isn't made of a magnet or doesn't have a magnetic field.