To locate the specific content you are looking for, the best methods include:
Based on available records, Amateur_Throwaway_2020.zip generally refers to an archived compilation of Reddit posts or images from a "throwaway" account (often NSFW/sexual in nature) created in 2020. Because such collections are usually user-created and shared in private forums or specialized subreddits, a single "official" text file does not exist. Amateur_Throwaway_2020.zip
Use a Reddit search tool or search engine to find the user biggestthrowaway2020 or similar variations. To locate the specific content you are looking