Panasonic's rewriteable 100GB BD-RE XL discs will launch this April 15

100GB BD-RE XL discs from Panasonic
If you are looking for the higher capacity disc, Panasonic Japan finally have their first 100GB BD-RE XL rewriteable disc. To give you some information, this new disc will store around 12 hours of 17Mbps terrestrial broadcast full HD or 8 hours and 40 minutes of 24Mbps HD. This new disc will launch this April 15. So, don't missed it.

If you are intending this new disc for your back up, I don't think it is cheaper for you. Just go with the cheaper hard-drive because this disc is three layer sandwitched with a fingerprint- and scratch-proof coating that cost 10,000 yen or $119 per disc.