CD + R is a blank CD that can record data with CD / DVD Writers. These CD + Rs can be added later as Multisession Disc.
(4) CD-RW (Compact Disc – Rewritable)
CD-RWs are blank CDs that can be repeatedly erased/rewritten like USB memory sticks. Normally CD / DVD discs are 120 cm in diameter, but some compact CD / DVD discs are only 80 cm in diameter. The capacity is only about 180 MB. If you look at earlier CD writers, you could see that they were written 48x or 52x. This means that the CD Writer can write at 48x speed; It can write at 52x speed. CDs have a 1x Speed of 150 KB / s. So 48x means you can write and read 7200 KB of data per second.