Retaining apparatus for data storage device

A computer comprising:

• a bracket comprising a side plate, the side plate comprising a retaining opening at a front end thereof;
• and
• a retaining apparatus comprising:
• a tray for receiving the data storage device;
• and
• a retaining device comprising:
• a base member attached to the tray;
• a retaining member movably attached to the base member along a first direction, the retaining member comprising an engaging portion and a retaining portion;
• an arm member pivotably attached to the base member about a pivot axis, the pivot axis being located at a first end of the arm member;
• the arm member having a driving portion at the first end engaged with the engaging portion;
• wherein the first direction is substantially perpendicular to the pivot axis;
• the retaining member is capable of being driven to move along the first direction by rotating the arm member;
• and
• wherein the arm member is rotatable between a retaining position where the arm member is positioned parallel to the base member, and the retaining portion is driven to protrude out of the base member to engage with the side plate at the retaining opening, and a releasing position where the arm member is angled from the base member, and the retaining portion resides in the base member and is disengaged from side plate.