Additional details about the PlayStation 4 have begun to emerge following last night's announcements. In addition to be region-free , we've now learned that that the system's 500GB hard drive can be removed and upgraded. Sony Worldwide Studio Head, Shuhei Yoshida, confirmed the news via Twitter early this morning. The move gives the PS4 yet another advantage over the Xbox One, which makes the hard drive inaccessible to consumers

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What remains unclear, however, is whether the system will use a standard notebook hard drive, like the kind used by the PS3 or a proprietary storage format. We've reached out to Sony representatives for clarification.

Scott Lowe is IGN's resident tech expert and Executive Editor of IGN Tech. You can follow him on Twitter at @ScottLowe and on MyIGN at Scott-IGN