Data Recovery and Disk Utilities Forum @R-TT

I have an 18GB file with the extension .rdr I am assuming this is a back up image file. It was made in June of 2013 on a computer we no longer have. It was a lenovo computer that was probably Win7 but possibly win8. Some files on this lost computer have recently become important. Would the R-TT software be able to open this file and could we be able to selectively retrieve files. Any assistance would be appreciated

You may try. Install a demo version of R-Drive Image and test. The demo mode of the program fully functions for 1 month. You don't have to recover the entire image to a disk, just connect the image as a read-only logical disk.