[karlicoss]

I sync about two hundred thousands of files without any problems, especially if your aren't changing them all the time. The only issue I can imagine is initial sync with so many files might take a while, even if total size isn't huge. As for several terabytes, for me it's a bit less than a terabyte in total for all synced folders, but also can't see why it wouldn't scale up. I guess similar, initial hashing might take some time, but otherwise it should handle it well.