I had this problem which cannot copy large size files and getting the error 0x8007046a. but I solved the problem in this way. The windows page size in source server was low. The source server had 32GB RAM but the page file was only 2GB. I increased the page file and set it to System Manage Size in source server and it solved my problem. Please test this in your case and let me now if your problem goes away too!Hossein Tavakkoli