FastCopy is the Fastest Copy/Delete Software on Windows. It can copy/delete unicode and over MAX_PATH(260byte) pathname files. Automatically, after whether the copy origin and copy destinations are HDD according to same physical HDD or is judged, it operates as follows. Diff HDD: Reading and writing are done with the MultiThreading in parallel. Same HDD: Using big buffer, reading until the buffer becomes full, and writing in bulk.