Using nnBackup you can choose one of the following backup methods:
 
conventional copying of files and folders  
copying your data into a special numbered stack of folders or zip-files with predefined depth  
incremental backup (like the one, used in Unix dump utility)  
folder synchronization (one- or bidirectional)  
Main nnBackup advantages:
 
small memory fingerprint  
fastest possible working speed  
customizeability:  
setting of inclusive and exclusive file-name masks  
working with file creation/modification/last-access times  
customizeable processing of empty folders and deleted files  
customizeable processing of errors when copying files  
switching of a default warning messages language etc...  
automatical starting of specified external applications before or after main backup process, taking into account their exit codes  
reading startup parameters from a text file  
optional logging of all of your backups

start any program as a service  
run tasks as if they were started by specified user  
shut down and hibernate the computer or put it into sleep mode at a specified time  
"wake up" the computer in order to run a task  
display, hide, close, kill, minimize, maximize and hide specified windows to system tray  
display messages on screen and write them in a log file  
work with clipboard, files and registry  
emulate keyboard input and mouse activities  
dial and hang up  
use the system speaker to make beeps of specified length and frequency  
play audio files  
sync system time  
assign a specified priority to a process  
terminate any running process  
restart automatically after fatal errors  
keep track of files, flags, windows, processes, mouse activities, periods of idle time, keyboard shortcuts, getting online/off line, insertion of disk in a drive, presence of a host in network (ping), amount of free space on a disk, etc., etc.