A:AnswerNo difference. I couldn't find any different info online about a SP version. Anyway, I bought this version online after a price match and the model number on the drive is WD30EFRX.
A:AnswerYes, ANY hard drive will work in ANY machine as long as the form factor matches such as the physical size of the drive and the connection (SATA). Drives that are designed for use in a NAS are especially reliable in a NAS solution
A:AnswerThe RED drives are made specifically for Network Attached Storage drives or other applications that need super high reliability (family photo and important document storage!) The BLACK versions are made to be fast but not necessarily longer lasting like the REDs. If you want a faster RED drive they have the RED Enterprise drives that run at 7200 RPM. They get much pricier though.