目前的移动存储介质大体上可以说是软盘系列和光学存储系列天下,软盘系列包括1.44MB软盘、LS-120和ZIP为代表,容量在120MB以下,不能够适应越来越大的文件存储需要;而光学存储的主流则是CD-ROM和CD-R,650MB的容量虽然足以适应需要,但“一次性”的特点又限制了它的应用,只能在“攒够”600MB以后才刻写一张CD-R,而且下能擦除;CD-RW虽然可以擦写,但又下能够在现有的CD-ROM上使用,那么有没有容量又大,而且可以擦写,同时 The current removable storage media can be said to be generally floppy disk series and optical storage series all over the world. The floppy disk series includes 1.44MB floppy disk, LS-120 and ZIP as representatives and the capacity below 120MB, which can not meet the requirement of larger and larger files. The optical storage is the mainstream of CD-ROM and CD-R, 650MB of capacity, although sufficient to meet the need, but the “one-time” feature has limited its application, only “Save enough” after writing a 600MB CD-R, and can be erased; CD-RW although erasable, but under the existing CD-ROM can be used, then there is no large capacity, and can erase, at the same time