A few months ago I used Windows Explorer to transfer between two servers. It took approx. 3 weeks to transfer 13TB before it crashed around 85%. This was from network drive to network drive.
Last week I started a TeraCopy transfer of the same 13TB to a local hard drive plugged in via USB. No more network drives which I believed to be the reason why it was slow. 5 days later and TeraCopy just began finally transferring the files, giving me an estimated completion time of over 800 days. It's transferred just 1% of the files.
I've added TeraCopy to my exclusions list in Windows Security but it hasn't improved the speed. I just paused it and initiated the transfer over RoboCopy, however there is no completion time as everything is being written to a log.txt that I have to keep re-opening to check the status. There is no percentage or estimated time.
Any suggestions? I'm not expecting this to be done over night. I was just hoping it wouldn't take more than a week or so. Again, this transfer is being done locally to a 18TB drive.