I have the automatic backup set to retain 5 generations of each file. Since I crunch on the files a lot, this is quite conservative. However, my 3TB backup drive is rapidly approaching capacity. Is there another parameter I can use to eliminate stale copies - like “When the 5th generation limit is reached, only keep the existing 1st generation for x period of time”. There must to be a way to avoid needing 5 times the main storage just for backup without sacrificing recently-created backup copies. Reducing the number of kept generations (the most obvious solution) only postpones the inevitable.