Actually, I know of one exception to that title. I just worded it that way to catch your attention. I know that defragging is not recommended for an SSD, for two reasons: 1) it’s not necessary, because, unlike HDD’s, there is no cost of latency time to switch to the next segment of a fragmented file, and 2) reshuffling multiple segments to glue them back together as a single segment represents a significant amount of "wear and tear" on the SSD — or words to that effect. Reason #2 gives me some concern about the life expectancy of an SSD, and I hope to see some replies to that concern. This post was born out of a recent Onyx run against our MBP, which found errors and suggested a repair run. I hesitated because somehow I had difficulty visualizing a "repair" of an SSD. So except for no defragging, can I feel comfortable treating an SSD exactly as I would an HDD, or are there other exceptions that I should be aware of?