+1 for Cobian. I've been using it for years now and use it to make a monthly full backup of all my data files followed by a weekly differential and a daily incremental backup to both a network drive and an external drive so that I have two sets of backups. It is easy to set up & configure for an automated operation and each set of backup has the date & time and so I have a history of backups going back several years, I delete all daily incrementals older than a year. Thus I can retrieve any version of any changed data file going back to any day within the past one year and any version of the same file going back several years to any week prior to the past year. Relatively inexpensive high capacity drives help make this possible.

All my data files are organized under various subfolders within subfolders by type of data and are on a separate partition on my laptop in a root folder called D:\DATA and almost all my applications are configured to store or read files from the appropriate subfolders in D:\DATA\.