Hello,
I sell Supercopier/Ultracopier in bitcoin at free price (but correct).
Ultracopier/Supercopier 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 ...
It have save me lot of time, even when the HDD is dead. And do advanced stuff (filter particular file, the folder to sync, make backups, ...)
The ideal is to test the free version to get an idea.
Give me your offer.
Cheer,