Abstract: The present invention discloses an external hard drive case, which is used to accommodate a hard drive and electrically connects with a computer. The external hard drive case comprises: an inner casing and an outer housing encasing the inner casing. The inner casing has an accommodation room having a circuit board, and the circuit board has a connector and a hard drive connector electrically connecting with the hard drive. Specially, the inner casing has a preformed hole arranged corresponding to the connector. The connector is well aligned to the preformed hole beforehand, and then, the circuit board is locked to the inner casing. Thereby, when the user assembles the inner casing into the outer housing, misalignment will not occur between the connector and the preformed hole. Besides, the yield and the fabrication efficiency are thus promoted, and the fabrication cost is effectively reduced.

Abstract: A hard disk drive fixing structure can accommodate a hard disk drive and can electrically connect with a computer to transmit information therebetween. The hard disk drive fixing structure has an accommodation casing; two rotary fixing members, which are corresponding to the fixing threaded holes of the hard disk drive, are pivotally installed to two lateral sides of the accommodation casing respectively; each rotary fixing member has at least one fixing protuberance; via the rotation of the rotary fixing members, the fixing protuberances can be respectively inserted into or withdrawn from the fixing threaded holes. Thereby, the hard disk drive can be fast assembled to/disassembled from the hard disk drive fixing structure of the present invention without any screwing/unscrewing activity but just via rotating the rotary fixing members.