What are some alternatives?
When comparing Copywhiz and NiceCopier, you can also consider the following products
TeraCopy - TeraCopy is a compact program designed to copy and move files at the maximum possible speed, providing the user with a lot of features.
Ultracopier - SuperCopier replaces Windows explorer file copy and adds many features: Transfer resuming, transfer...
Robocopy - Robocopy is a free file copy tool that is included with the Microsoft Windows operating system. It allows one to construct complicated instructions to move, or copy files.
FastCopy - FastCopy is the fastest copy, delete, & sync software on Windows.
SuperCopier - Download Supercopier 4 which is free and open source software licensed under GPL3 that acts as a replacement for files copy dialogs. Main features include: play/pause, speed limitation, on-error resume, error/collision management .
Copy Handler - the open source, free file copy utility that is: fast, highly customizable