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In a word, Price. Blue ray disks are best viewed with HDTV's for maximum picture clarity, this is expensive if you do not have one already. On top of that, Blue Ray Disks are more expensive than conventional DVDs.
Yes their is more cds than DVDs
No. Floppy disks have the lowest storage capacity of any mainstream storage device. Hard drives, CDs, DVDs, and Flash drives all hold far more data than a standard floppy disk. Even when they first came out, hard drives and tape reels held more data (though they also cost far more).
No. They are fragile, low capacity, and more expensive per megabyte than other storage devices. For a full backup, you would want at least several CDs, or perhaps a couple DVDs. if you have a lot of large files, even an external hard drive may be necessary.
Blu-Ray discs are more expensive than DVDs, but Blu-Rays have louder sound than DVDs do and better picture quality. And the image of a Blu-Ray disc on an HDTV looks like you really are in the place that the screen is displaying
what is more expensive than the dress
Blu-Ray is sold much more than DVDs, but DVDs are still sold today
A 2 Disc DVD movie can fit on a single Blu-Ray Disc and be in HD which is more GB. The length of a Movie remains the same, but the Blu-ray has more room to add extras besides the movie.
YES!
more than 1
Presumably because they are an easier way to carry around data than dismantling and transporting a hard drive.It is highly doubtful whether floppy disks are useful today, they have too little capacity. A USB flash drive serves the same purpose (simple to carry data around) in a smaller format and with more storage space.For permanent backups or installing programs, CDs and DVDs have taken over the role of the floppy disks.
Blu-Ray is expensive because it is much better than DVDs in nearly every way. Blu-Rays hold up to 5 times more storage than a DVD can hold and they usually contain special material that gets released only on a Blu-Ray disc