IPod classic
The iPod Classic is a portable media player
Portable media player
A portable media player or digital audio player, is a consumer electronics device that is capable of storing and playing digital media such as audio, images, video, documents, etc. the data is typically stored on a hard drive, microdrive, or flash memory. In contrast, analog portable audio...

 marketed by Apple Inc. The current generation is by far the most capacious iPod, with 160GB of storage.

To date, there have been six generations of the iPod, as well as a spin-off (the iPod Photo
IPod photo
The iPod Photo was a portable media player designed and marketed by Apple Inc. It was the top-of-the-line model in Apple's iPod family. It was positioned as a premium higher-end spin-off of the fourth-generation iPod on October 26, 2004...

) that was later re-integrated into the main iPod line. (Some sources incorrectly refer to the revisions of the sixth generation as a separate "seventh generation.") All generations use a 1.8 inches (45.7 mm) hard drive for storage.