Is there any free backup utility which is able to start automatically (without any confirmation) the backup to a usb external disk when I plug it? No windows native autorun.inf feature, please. Thanks.
Backup SafeKeeper has a "Set it and forget it" option, but the only way to find out what this means is to try it.
An excellent commercial product that does it for sure is SyncBackSE. I mention it although it's not free because I use it a lot (but alas, the free version).