Babi: Erasing/deleting after viewing is probably what most people do. We are big fans of geology shows about earthquakes, volcanoes, tsunamis, etc., and these often mean re-viewing. My son is an avid fan of car racing and he likes to see these more than onc. Add his football team, SF 49ers, tennis, soccer, pretty soon the space availoable is in the single digits. A program i have saved is Secret Yellowstone. Among other vignettes it describes the search for waterfalls in the outer wilderness. Previously there were 5 known falls. As a result of the search there are now at least 300. the graphics are super; a satellite-type view of the park is used to show different aspects - the areas of the wolf packs, the extent of areas damaged by fires, the locations of the 300 falls, etc. I will spend happy hours seeing this over and over.