What is the difference between single-level and hierarchical file systems?

In a single-level file system, a disk directory (disk table of contents) is a linear sequence of file names and corresponding starting sector numbers. A multilevel file system is a system of subfolders, each folder can store other folders, as well as files.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.