I use the adapter together with a ZIF to CF adapter and a 128GB SD (believable even by Komputerbay) in my iPod Classic 5.Gen as hard disk replacement because the hard disk has there given up the ghost. Performance problems or like I could so far not be determined, rather the opposite, since the transfer rate and access speed, the iPod hard drive is significantly higher than the. In short order, the adapter does what he should / what I expected for my purposes.