Given below are the steps which might help you in recovering some files from your corrupted RAR archive:
• Download RAR Fix Toolbox software and install the software to your computer desktop/laptop https://www.fixtoolbox.com/rarfix.html
• Launch the repair application and stick to the procedure
• Hit the “Browse” button to choose the RAR file which is to be repaired
• Initialize the repair process by clicking on “Repair” button
• The program starts the repair process
• Monitor the repair process via progress bar
• After finishing the repair process, the tool displays all the files and folders from the RAR file
• Click on “Next” button
• Finally, save the repaired files to your desired destination location by making use of “Save” option’
