Cannot overwrite a file on an SMB network share After upgrading to OSX 10.10 Last week I upgraded to Yosemite and I work a lot with saving files to a network share, mainly updating existing templates. Usually I just copy the newest template to the network share and it asks if I want to Overwrite/replace. Now when I attempt that it never asks me if I want to overwrite. It just hangs. Then if I attempt to change the file on my desktop, like rename, I get the error -8076. To resolve that error I have to run killall Finder for it to release the file.

I am however able to delete the file and then copy up the new one but when working with 40-50 new files a day that is a burden especially with large files.

Any help would be much appreciated.
Try connecting to the drive with CIFS:\ instead of SMB:\. I have had the same issue and when trying it with the CIFS protocol it worked.