What is AVF_INFO folder in Sony camcorders

Well if you are not using the "Special" sony fucking software for transferring the data from your camcorders on your hard-drive - well lets say you just simply connect the USB cable and then you copy the files e.g. in Total Commander, then you have to expect, that there will be also a folder (on the Sony camcorders harddrive) which is called AVF_INFO. It pretty much stores the data ABOUT all the things you made - like photos, videos in AVCHD format, videos in MPEG2 format etc. So when you succesfully transer all the multimedia files and you will leave the AVF_INFO folder intact, then you have to expect, that later if you use the "play" function on the camera, it will tell you, that there are e.g. 55 videos, but there are none... so you have to manually delete all the "system" files in the "AVF_INFO" folder. After you turn on the camera, it will say some shit, that the image file is broken (technically it is not broken, but deleted ;o), and it will create new correct image files in 3 seconds. Maybe using the special Sony software is better option, but... yeah... I like this more ;o).