In the book Digitizing Your Photos, I outline a method to convert negatives using Lightroom’s curves. I’ve been very happy with the B&W conversions I get, and moderately happy with
New article on Petapixel outlines the benefits of Lightroom preview rebuild. Improved speed, saved space and integrity checking.
I’ve been using ChronoSync for many years, and depend on it to manage backup from several machines to a central file server. It has worked quite reliably over the years,