May I know what exactly are you looking for?
As Lightroom has it own backup mechanism in which you just have to specify a location where you would like to store your back up
Please refer the following link to know more about Lightroom backup :
Please let us know if it helps.
I am looking to back up my images stored on my external hard drive. In particular I have other media stored on my hard drive and wish to find a program that will mirror all of the data on my main external drive to another external drive. So I can just work with one drive, add and move files then have some third party software mirror all the changes to another drive.
Please check the below link that would help you to know more about Lightroom backup strategy:
I am not the right person to tell you the third party softwares you can use to backup your computer files.