Which PlayStation console introduced the Memory Stick as its main removable storage format?

The PlayStation Portable introduced Memory Stick as its main removable storage format.

The PSP used Sony’s Memory Stick Duo and later Memory Stick PRO Duo cards for saved games, downloaded content, photos, music, and video. This storage complemented the system’s physical Universal Media Disc format rather than replacing it at launch.

The PlayStation 2 instead used dedicated memory cards for saved games, while the PlayStation 3 commonly used internal storage and supported other media options. The PlayStation Vita later introduced its own proprietary memory-card format, so it is not the answer.

The PSP’s reliance on Memory Stick reflected Sony’s broader strategy of using the company’s removable flash-media family across consumer electronics. Different PSP models supported different capacities and storage arrangements, but the family consistently centered on Memory Stick media.