Any software to do minute-by-minute backup? [closed]

Another couple of options you could take a look at:

File Hamster DocShield

There are free versions of both.

One other option for continuous backup would be Comodo Time Machine

However, some users have had problems with the software, so I'd suggest taking a look at the forums before you install this:

Comodo Time Machine - CTM

I'm not aware of any freeware to do real-time or CDP. If the data is that important, you might have to pony up for some software.

You could try scheduling software like Robocopy, rdiff-backup, or something else to run every minute or so. If the files you want to back up are going to be held open, you'll need to handle that somehow. For Windows, you'll need to use Shadow Copies (VSS). Adi Oltean's Blog has several posts on mounting VSS snapshots to make them easy to copy from, if you're using software that's not VSS-aware. HoboCopy may also be useful.

What about Dropbox? Set your editor to save it every minute and Dropbox will save it every minute. Also you can revert to previous versions on the Dropbox website. (There is a policy about overuse but I guess you won't edit it 0-24.)