Hi,
When you say the speed of 'read' and 'write' what do you mean? These are Synology units and the local backup to the drives gets about 130 MB/s
What is odd is that the speed in the 'speedometer' varies so much. Can you explain what this is showing and whether you'd expect it to fluctuate?
Here the speed is down at Zero with the job still running, but a few moments ago it was at 40 MB/s - is that right?