Hi there,
I use regularly Toucan for saving my data files and it works fine.
However, when I do a mirror of a very big folder (one folder containing many files -- around 30 Go of .mp3 in a unique folder), Toucan fails to succed and it crashes before ending the process. I don't know if it's a bug or a inherent limit of the program. Just felt it could be usefull to tell about it.