A rotor of an electric motor, including a rotor core having a plurality of magnet-retaining apertures, a plurality of permanent magnets individually received and retained in the magnet-retaining apertures of the rotor core, and a resinous filler filling a gap defined between each magnet-retaining aperture and each permanent magnet and fixing the permanent magnets to the magnet-retaining apertures. The HAMR transducer is optically coupled to at least one laser and has an air-bearing surface. The user may further choose various options including shrinking the new content to fit the page andor may choose to have the existing content shifted to make room for the new content.