It is never a bad idea to record a backup when doing single system work directly to camera. Having a high quality direct copy available for post can sometimes save productions. It is always higher quality because I am recording at 24 bit 48khz and the preamps in a sound devices, deva or fostex recorder are and will always be much higher quality. Some people may question why record at 24/48 instead of 16/44.1 if this is only a backup. Well with my new 702T and a 32gb Compact Flash (CF) card I have about 31 hours of record time so I don’t have to worry about running out oof space. I usually copy the CF card every 2 days at night while sleeping. Since I have a 500gb drive I just keep the back ups until the drive is full and then replace older back ups. If a client ever wants a back up I charge them to copy it over and then sent it. It has only happened once but I am always ready if it happens again. On commercials and non reality jobs I usually mirror to the dvd-ram drive and provide the client with the back up everyday, which is standard practice. I firmly believe whenever possible it is my job to safe guard the audio and make sure we have all of it. Doing a back up recording ensures this.