In another thread, a well known participant of these pages lost a lot of data from a computer glitch.
I've been a computer professional all my life and I use a dos batch / script to update my 1TB external drive and thumb stick daily.
It uses less than 4 kilobytes of disk space, uses no memory resources, and needs no installation. It's completely unobtrusive to the OS and does only what the user tells it to do. It's also menu driven and impossible to mess anything up, it has a number of error checking processes that make it an easy backup scheme to use.
After an initial backup which depending on the volume of data you have AND the USB spec your machine and drives support it will take seconds to update your data daily.
I have roughly 106 gigabytes backed up that I can ill afford to lose, which is the reason I wrote it.
So, if anyone here knows how to modify a simple text file with the location of their data and the destination drive letters, I'll send it to you via Email. Since Email may have problems with a filename with a .cmd suffix, I would send it as a .txt (text) file and it can be modified and renamed by you.
I don't know how the board administrators would like it but since it's only text I could copy it in a post here also.