I've got a 90GB+ directory that I sync between a Raspberry Pi and a Windows 10 64-bit machine; this has always worked fine. Recently I moved the Windows side to a Windows 7 32-bit virtual machine. It syncs most files fine, but it fails on very large files (haven't explored the limits extensively but I think 4 GB is the tipping point; it works fine on a 2.5 GB file, but fails on a 4.2 GB file and a 6 GB file).
The symptoms are that it transfers a bunch of data like normal, but eventually it stops transferring. When sending from Windows to the Pi, the Windows side says "Indexing" (forever), and the Pi side says Status 0%, and Progress is "0% - a few minutes" (again, forever).
The Pi side hasn't changed at all so I don't think that's the problem. I'm running the latest clients.
Is there a file size limit related to the 32-bit windows client? (All file systems are NTFS, so it's not a FAT32 limit.)
Could there be a config setting I'm missing?