The connection was being dropped during a FTP transfer.
We saw on the error logs that a timeout was occuring and it seems to be documented on the Filezilla Wiki: Timeouts on large files.
Two alternatives to solve this problem
- Change the protocol that you’re connecting from FTP to SFTP
- Set the connection to make an active transfer instead of a passive transfer
According to the website, it had drivers for Windows XP and Windows Vista but no support for Windows 7. I solved this problem by installing a beta driver available at the SteelSeries blog. Other people reported success right-clicking the driver installer and selecting to execute in Windows Vista combatibility mode.
Now you just need to download the official Windows 7 drivers at the manufacturer’s website.