“What does SP designate at the end of this model number? The Seagate 2 TB SSHD has two model numbers, ST2000DX001(bare drive) and STCL2000400(retail package). This product has the model number ST2000DX001SP. This product is also $26 more expensive than STCL2000400, which should be the pricier of the two products as it contains installation parts. Is it possible that these two model numbers are reversed, and there is no "SP" version?”