I'm a photographer. I've used a Dell XPS desktop running Windows 8.1 for a few years in conjunction with 4TB networked external hard drive. I frequently transfer large photo files the desktop, when renumbering photo files using PhotoShop, burning files to a DVD or BluRay, or when saving these files from a portable hard drive to the network hard drive. The system has worked flawlessly up until recently. After returning from a trip in June, it began showing this error message when transferring large files, 3-4 GB and up. The transfer speed varies up and down during the transfer, sometimes stopping all together, then starting again, but eventually it stops, and an error comes up, "An unexpected error is keeping you from copying the file. If you continue to receive this error, you can use the error code to search for help with this problem. Error 0x8007003B" It then shows the photo where the transfer stopped with its specifics, photo number, type, date taken etc. Under that it shows three buttons, "try Again" "Skip" and "Cancel". If I hit "try Again" the process will often resume, however, I need to be there to do that, and in most cases the file where it stopped dopes not transfer fully, the photo is damaged (it was not damaged in the original folder).
In the past I've done very large file transfers that have literally taken 24 or more hours with no issue.
I have changed all network cables to high quality CAT 6, changed the router, and the same problem occurs when on WiFi or hard wire.
I've checked with the drive manufacturer, went through troubleshooting, shared the error code, and they say it's not a drive issue (of course).
This has brought my photo saving workflow to a standstill
Any help would be appreciated.