CD-RW
its either a re-writable disk or its not!
Yes.
A floppy disk DRIVE can read, erase and save information on a floppy disk. The disk can't do it by himself.
well, it depends on what kind of softwear you had to burn your cd.
Yes, of course!
Formatting your hard disk for the PS3 will erase everything on it. If you are adding a hard disk to your PS3 it will prepare the drive for the system.
Yes - that's basically what a hard disk is for. Perhaps I'm missing your question - can you rephrase it?
go to disk utility and you have the option to erase there
To erase a floppy disk with magnets, you would need a strong magnet, such as a neodymium magnet. By placing the magnet close to the disk's magnetic media, the magnetic fields can disrupt the data stored on the disk. However, this method is not highly reliable, as the effectiveness depends on the strength of the magnet and the type of disk. Additionally, using magnets can potentially damage the disk, making it unusable.
Go onto "My Computer" right click on the disk, and then select "Format" it will not entirely erase all the data on the CD, but it will erase majority of it.
You can't erase data from a DVD, so there's no option to do so.
This disk will certainly have to be reformatted and irreparable damage may have been caused. It is not advisable to do this.