A flash drive and protective cover mounting structure includes a flash drive consisting of a casing, a memory module, a electrical connector and a positioning member, and a protective cover including a substantially U-shaped and relatively larger outer cover component having a smooth outer surface and a substantially U-shaped and relatively smaller inner cover component mounted in the outer cover component pivotally connected to the casing and biasable relative to the casing between an open position to expose the electrical connector and a closed position to shield the electrical connector.