As per the manual of my Panasonic camcorder, I use the supplied 'HD Writer AE' software (v2.0) to download the AVCHD files from my camera to my PC. When it does this, it also creates three additional files for each and every AVCHD file. The extensions of these files are .cont, .pmpd and .tmb. Does anyone know what each of these three files is for? Do I really need to use the HD Writer AE software to extract my AVCHD files? If those three files are only needed for the operation of HD Writer AE (which has no features of interest to me), then can I go ahead and delete them? I have several different movie projects ongoing on my PC and making sure that each AVCHD file remains in the same folder as those three mystery files is a time-consuming hassle. The manual says that you aren't supposed to move the files from within Windows File Explorer, but since I'm unaware of anyway to do this from within HD Writer AE, that's what I've been doing, and they seem to open just fine in other programs.