Double Negative wrote:
Strange problems with that external drive... Was it used on another Mac previously?
Sounds like it might have ownership/permission problems. One thing I'd try is running Disk Utility and verifying/repairing. Also, do a Get Info on that drive and make sure you have full read/write access.
Yep, did both of these things, or I should say attempted to do so. Disk utilities couldn't access the disk to repair it but the drive info confirmed full read/write access. My conclusion is a faulty drive & am awaiting return authorization from Adorama. After I restored all of my photos files to a LR folder on my internal drive, everything is now working as it should. Particularly no problem in accessing my NIK files; for example, here is a photo I edited using Vivesa 2 with all functions doing as advertised: