OpenAtv 3 Image backup

would you please tell me what Is the way to do a full backup using OpenAtv 3 Image
In menu there Is a plugIn called Flash & Backup v9.2.4 mod which Is useless - when I tried to do a backup It restarts enigma and makes 145 kB nfi file
Is there a proper plug In that can do a full back up

I use Flash & Backup tool 9.2.4 MOD which Is build In Image
I choose a dir which Is mounted on PC and at that dir I get two files - nfo with size 1 KB and nfi with size 145 KB