I have just done a clean install of Windows 10, and I'm in the process of putting everything back where it belongs.
I want to copy some symbol libraries for a CAD program from my Terastation TS1200 to the libraries folder of the CAD program in C:\Program Files.
If I try to copy them directly, the files are 'discovered' (a few hundred of them), I get the 'you will have to provide administrator permission' question, then I get a message Y:\ is unavailable....If the location is on a network make sure you are connected". (My Terastation share is mapped to Y:)
If I copy the files to another local drive (D:) first, then to the C: Drive, it works.