I've used this program for backup of my business docs. Specifically there are three issues that make this program almost useless. First, it randomly & liberally renames your files. If you have hyperlinks, it just wipes them out. You'll be renaming files everyday, if you can find them. Second, It duplicates your files. I have had files duplicated up to 75 times. This duplicating made my 9 gigs of word and excel documents into 17 gigs. Then, while trying to find each douplicated doc among thousands of docs and hundreds of folders, 4 sinc hammers your computer with over the limit warnings. Third, while its busy renaming your files and duplicating entire folders, it takes up so much processor and bandwidth it shuts you down until you shut it off. If you want to use this for a back up... Don't. Find a program that works. I didn't even mention the incessent pop ups that come fast and heavy when the program crashes.