The backup files are of a proprietary format, intended solely as the source of data for restore to a BB. As such, they are not human-readable on the computer. But, there are plenty of 3rd party computer apps out there that can parse and present the data to you in a human readable format...search (e.g., Google) and ye shall find, I am sure.
Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.