just making sure this will be a smooth replacement process
http://www.amazon.com/Seagate-Laptop-7200RPM-Cache-ST500LM021/dp/B00ISKS416/ref=sr_1_1?s=pc&ie=UTF8&qid=1457241373&sr=1-1&keywords=laptop+hard+drive&refinements=p_n_feature_keywords_three_browse-bin%3A4990425011
http://www.amazon.com/Seagate-Laptop-7200RPM-Cache-ST500LM021/dp/B00ISKS416/ref=sr_1_1?s=pc&ie=UTF8&qid=1457241373&sr=1-1&keywords=laptop+hard+drive&refinements=p_n_feature_keywords_three_browse-bin%3A4990425011