Option to Preallocate file space on disk

Teracopy can already check for available free space before running the copy, but it would be even more useful to me to have an option in the preferences menu that would pre-allocate space on the target disk for all files prior to running the copy, as this would greatly improve my transfer speeds overall. Even better would be a way to asynchronously preallocate space while the copy itself begins, considering the actual data copy would likely run slower than the preallocation step would overall. 

Thank you for your consideration! I'm an avid fan of Teracopy and the superior performance it provides, and I tend to use it every single day when doing any kind of large data transfer. Keep up the great work!