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This video is about the concept of File allocation methods. It is the techniques in which the files can be allocated space on the hard disk using Contiguous allocation(continuous blocks of data should be allocated to a file), Linked list allocation( linked list is used and file is allocated space in non contiguous fashion, as pointer of one data block points to the address of next block and so on), Indexed file allocation (in this the first block is index block as it contains the link to all other blocks).