Btsync Not Working With Windows 8.1 And External Hdd

[pgrm]

We're using BtSync on 3 laptops + 1 server

 

2 of the devices run it in Linux with integrated HDD, 1 MBA with external HDD formatted as exFAT and one Windows 8.1 laptop with external HDD with exFAT.

 

All devices work great together except Windows 8.1. It used to work when the files were on the local NTFS-formatted HDD, but with the external exFAT HDD BtSync shortly after starting (~2min) stops syncing files. the CPU (Sandy Bridge Core i3) runs with 20-30% but HDD and Network usage go down to 0% and the BtSync application isn't responding anymore.

 

I've checked the debug flag and when I change files in the folder, I receive an OnNotifyFileChange, but I couldn't find any error except many lines like:

 

... SF[49E9]: Torrent FILE_NAME status:137 error:<NULL> meta:1 conns:1 io:0

 

FILE_NAME is the actual file name, but "<NULL>" is literally written there.

 

Any ideas what the error could be or how to fix it?

 

I've tried reinstalling BtSync, installing an older version, as well as I'm running the latest version right now, but still getting the same problem - it just doesn't work.