I was getting the same error but in a slightly different situation...while copying files from a NTFS formatted volume to two different external USB drives, both formatted with ReFS. After a lot of troubleshooting, including making sure the files are not fragmented (using sysinternal's Contig tool).......I broke down and formatted the external drives using good old NTFS...and voila! problem gone!

ReFS is probably not good for prime time.........OR......maybe it is designed for virtualization........I have been using it at work in my production hyper-v clusters with no issues.....but at home....fail :-(

I do want ReFS, like the OP but it does not work for me.