1. A USB flash drive, comprising:
a housing comprising internal walls defining a receiving space, at least one of the internal walls having a plurality of engagement
a memory main body disposed in the receiving space and comprising a hook slot component; and
a fastener disposed in the receiving space, the fastener including a plurality of protrusion components and a hook component,
the hook component engaged with the hook slot component of the memory main body, and the plurality of protrusion components
engaged with the plurality of engagement components of the housing, thereby fastening the memory main body to the housing;
wherein engagement of the plurality of protrusion components of the fastener with the plurality of engagement components of
the housing prevents movement of the memory main body with respect to the housing.