The only thing noted on this image.... is the "overwriting " of  bytes...which for flash should not be noted as overwriting. Overwriting is done in hard disk....you can not over write in flash. 

Cassandra the difference between what Norris/ Daberko offer are in this statement....

"Pointers within the file system to data blocks are not physical pointers, but concatenation of a logical erase-unit number and a block number within the unit."

"Fig. 4. The data structures of the Microsoft File System. The data structure near the top shows a linked-list element pointing to a block of 20 raw bytes in a file. The bottom figure shows how the data structure is modified to accomodate an update of 5 of these 20 bytes. The data and next-in-list pointers of the original node are invalidated. The replacement pointer, which was originally free (all 1’s; marked in gray in the figure), is set to point to a chain of 3 new nodes, two of which point to still-valid data within the existing block, and one of which points to a new block of raw data. The last node in the new chain points back to the tail of the original list."

This defines a logical overlay pointing to the raw data

Norris/Daberko manage within the raw data....physically

doni