Device and method for destroying a hard disk

A device for destroying a hard disk, which the hard disk comprises a plurality of platters concentrically placed around a drivable shaft, the mobile device comprising:

• a cutting device having a first knife connected to a driver for completely cutting through the hard disk;
• a feed channel, elongated in a feed direction, through which the hard disk is moved towards the cutting device by means of a feed device, wherein the feed device is disposed for stepwise feeding the hard disk in the feed direction to the cutting device, wherein step sizes of the stepwise feeding are adjustable;
• clamping means for preventing pieces of platters from being pulled out of the hard disk during the cutting;
• wherein the cutting device is arranged to cut the hard disk substantially perpendicular to the feed direction;
• wherein the clamping means comprise at least two blunt protrusions, wherein a width of the feed channel and the arrangement of the blunt protrusions are such that, during operation, the at least two blunt protrusions engage the hard disk on both sides of the drivable shaft and wherein the protrusions are configured for deforming and clamping the platters in the hard disk;
• and
• wherein the first knife has a central horizontal section and two oblique sections extending outwardly and downwardly from both ends of the central horizontal section, and wherein the at least two protrusions are arranged on the central horizontal section.