Backup Freebyte faz backups incrementais e é software livre.
Freebyte Backup is a freeware backup program for Windows. It allows one to easily copy (and filter) a large number of files and directories from various sources into one backup directory. It is possible to backup all files found in the specified set of input directories, or to have only certain file types copied. Files can be filtered according to file-extensions. E.g. you can specify that you want to backup all .doc, .rtf, .jpg, .bmp files, but none of the .exe, .dll and .txt files. You can also very easily define new file extensions inside the filter.
Incremental backup options
With the optional 'Incremental backup' feature, the program only copies files which have not yet been saved by Freebyte Backup. It is also possible to specify a date, so that only files changes/created after a certain date/time are copied, or to only copy files if they are more recent than the corresponding files at the target location.