Analyze data in 4 excel files, compare repetitive data and separate it from non-repeated data

I am looking for a freelancer to help me analyze and process data contained in four excel files. The goal of the project is to compare the repetitive data found within the files and then separate out the non-repeated data. In addition, I need help with formatting the resulting data for better analysis and visualization. If you have experience in data processing and formatting, this project might be just what you're looking for! This is an urgent task, so please don't hesitate to bid if you think you're the right person for the job.