Data storage device with spindle motor

A data storage device comprising:

• a stator;
• a rotor rotatable about the stator, the rotor comprising a hub;
• at least one disk mounted to the hub, the at least one disk defining a central opening;
• and
• a clamp attached on the hub, the clamp comprising a pressing part pressing on the at least one disk such that the at least one disk is capable of rotating with the rotor,
• wherein the hub defines a recess below the at least one disk and in communication with the central opening.

A method of assembling a motor, comprising steps of:

• providing a stator with a rotor rotatably surrounding said stator, said rotor including a hub;
• downwardly locating a round memory disk, via a non-vacuum procedure, to a top face of the hub, said disk defining a central opening concentric to the hub;
• and
• downwardly locating and fastening a clamp to the hub;
• wherein said clamp includes a cylindrical wall compliantly received in the central opening, and a periphery region downwardly pressing the disk against the top face of the hub.