Meaning – The term read-only, refers to data that can be read but cannot be modified.
Most operating systems, such as Windows and OS X allow you to mark individual files as read-only. In Windows, you can right-click a file and select to view more information about the file. You can click the Read-only checkbox (located in the General tab) to make a file read-only. I
n OS X, you can right-click a file and select disable write access to the file. A “locked” file on a Mac is the same thing as a read-only file in Windows.
to view more information about the file. You can then select the Locked or Stationery options in the file’s Get Info window toExample of usage – “A read-only file or storage device contains data that cannot be modified or deleted. While data can be accessed or “read” from a read-only file or device, new data cannot be added or “written,” to the device.”