There is an issue with larger files that has been fixed. Please see Slow LAN performance transferring a single 300GB file
Maybe this can fix your issue too. In short, too much memory and CPU is used the larger the file is.
There is an issue with larger files that has been fixed. Please see Slow LAN performance transferring a single 300GB file
Maybe this can fix your issue too. In short, too much memory and CPU is used the larger the file is.