Smart Update Failed - Device Full

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I also get this error. Working with video, my files tend to be quite large and they do get moved around. I usually get this error 50-70% of the time I try to mirror two drives of identical size.

There are so many things I love about this program, unfortunately I'm getting tired of comming in to my studio in the morning to find superduper failed to mirror my drive the night before.

Any chance this can be improved in a future release? I used to use psync to mirror my drives from the command line and I don't recall this ever happening.