External hard drive help please

I purchased an external hard drive recently and have backed up my computer files onto it twice. (I think.)

When I open up the F: drive (where it is plugged in) I can see alot of information and folders marked Images and MyFiles, but when I try to open either of those folders, I cannot see my files. The Images folder shows me Complete System Backup as an NBF file (?) and the MyFiles folder just shows a folder called Native and in the Native folder is File and Folder Backup as a CAL file.

How can I see my documents? Or can't I? Maybe I'm doing something wrong when I do the backup? Or maybe I misunderstand the external hard drive? I thought that it saves copies of my files onto it, much like a flash drive. Do I misunderstand??

Thanks for any help! (My external hard drive is a 1tb Toshiba, and my laptop is also a Toshiba.)