I am transferring large amounts of data (250GB-1.5TB chunks) from 5x 5400rpm 2TB drives to 5x 7200rpm 2TB drives simultaneously (via copy/paste in explorer) and the transfer speeds are incredibly slow. Initially the USB 3.0 speeds show up as quite fast (150mb/ps+) but then they slow down to around 3mb/ps.
The drives have not been manually defragmented but the vast majority of the files on each are video files of the same format (3.9GB each or less).
I am wondering if the amount of drives/data being used/sent is what is causing such slow speeds or if there might be another culprit? I would be incredibly appreciative to learn of any solutions to increase speed significantly. Many thanks...
OS: Windows 7 Professional
Processor: i7 4790k
GPU: Nvidia 970 GTX