I was copying 70GB of videos from H: drive (8TB HDD) to I: drive (8TB HDD) yesterday, and after a few minutes of copying at a rate of between 50MB/s and 180MB/s, it went down to 0MB/s, and internet access stopped. It stayed that way for about five minutes, then suddenly started copying again, and the internet appeared at exactly the same time - i.e. a blank webpage I had tried to reload a minute or two earlier, suddenly loaded.
So I decided to try using an old version of AOMEI Backupper from 2017, which I have on a USB stick, and booted into that instead of Windows, then backed up my C: drive to each of my various hard drives. Here are the drives I have in my system:
C: 250GB M.2 NVMe SSD Windows
D: 4TB - Two 2TB M.2 NVMe SSDs on an Akasa AK-PCCM2P-04 Dual M.2 PCIe SSD Adapter, spanned as one drive, for Kontakt sample libraries, and other VST (music synths) sample libraries.
F: 8TB HDD
G: 8TB HDD (back up of F: )
H: 16TB HDD
I: 16TB HDD (back up of H: )
M: 8TB HDD
N: 8TB HDD (back up of M: )
Below are screenshots I took while doing one of the back ups, to show the settings I used.
Backing up C: drive to D: drive (4TB - Two 2TB M.2 NVMe SSDs) took 3 minutes, at 750MB/s, no slow down at all.
To F: 8TB HDD drive, started at 300MB/s, stopped at 41% or 63GB copied, only for 10 seconds, then carried on fine all the way to the end at over 200MB/s.
To I: 16TB HDD drive, stopped at 33% or 50GB copied, started at 375MB/s until 70GB, then started, then continued pausing at regular intervals until finished.
To M: 8TB HDD drive, stopped at 41% or 63GB copied, then carried on until 76% or 114GB copied, and stopped again, then carried on until finished.
With H: and I: drive, I tried both of the copying methods on the 'VSS' tab, it seemed to make no difference which one I used, they both had stoppages throughout the copying process. I would say they stopped for about 30 seconds, then copied for 30 seconds, then stopped for 30 seconds, until finally done.
So I wonder if there is either something wrong with my two 16TB HDDs, or if something is wrong with the motherboard (because the internet also stops when I am in Windows and the HDD copying grinds to a halt), as I presume none of this can be caused by Windows, if I am using AOMEI Backupper and getting exactly the same stoppages.
But today, while copying exactly the same folder from H: to I: drive again, it didn't slow down to zero, it settled at around 85MB/s for the second half, but that's perfectly fast enough for me.