Devices to read information from CDs equipped with almost all modern computers. Devices to work with removable media drives are often called. To learn how to work with carriers, you need to know how they store information. If you just write many megabytes, you can not find out where the written page of text, and where the picture. All information is stored on media in the form of files. File – this is simply a sequence of bytes, which contains some information and that has its own name. For example, the encoded picture sequence of bytes, and calling it my favorite picture, you can keep the sequence on the floppy. That is, you save the picture file in my favorite picture on diskette.
Of course, in fact, encode and store will not you, and your PC, you just order him to do it. To know what information is stored in a file, its name is added to the second part, called the extension. The file extension – this is part of the name, which describes the type of stored information in it. For example, if the file extension doc, then it holds a text document, a file with an avi video contains a snippet. Expansion separated from the rest of the title point. The result is an interesting name or Zhurnal.doc klip.avi. Modern systems often do not show expansion, and as a file name serves only his name. At the same time file type can be found on its icon, that is, the appearance of the figure associated with the file.
Media can be stored on a lot of files, and not to be confused, you should use some system for storage. This system is called the file system. Files can be stored on a hard disk, diskette, CD-ROMs and other media, but the computer will work with different carriers equally, so as always use the same file system. All of the media referred to as disk and write letters with a colon, eg A: or C:. The disc can be written in the form of the cabinet, which houses many documents, that is files. Cabinets, as well as CDs, may vary in size, and some of them can be moved to other rooms, that is, disks can be transferred to other computers. On any disk can hold a lot of files, and for easy storage files are located in folders that can be represented as a box enclosure. In the folder, but files can be stored in other folders. At the same time, some files can be stored directly on disk, not in any folder. For example, the disk file Figure and two folders – the first and second folder folder. In your first folder is a file folder and document subdirectory. In the folder subfolder contains a file named Picture. In this case, although the file name is the same as that of the first file it's just another file, as it is in another folder. To find a file on disk, you must specify its name and the names of folders, which contain the file. This information is called a path to the file. Through to the first file will be only the name of the disk. Through to the last file is the name of the disk, the folder name the first folder and the folder subfolder.