A single-layer bHD/b-bDVD/b disc only store 15 GB whereas single-layer blue ray DVDs can store 25 GB which is more than 2 hours of bhigh/b-bdefinition/b video and 13hours hours of standard video. A double-layer bHigh Definition/b-bDVD/b can store up to …
See the rest here:
Blue Ray DVDs are Great Innovation of Blue Ray