I despise developers who use non-standard, non-user friendly geek speak which is why I downgraded this app by 2 stars. What the bleep is a chunk? How many "chunks" are in a file so I can estimate how long checksum calculations are going to take? How does a chunk relate to bytes? Please pay attention to who your audience is, in this case it is the public and most are NOT computer scientists. As a long time software engineer/team lead myself I fired or got rid of programmers who did not write programs directed at their user base and used geek speak, error messages etc that their users would find incomprehensible.