To manually convert an ICS file, open it in a text editor, parse the data (events, dates, attendees) using a script (e.g., Python with the icalendar library), and then convert and save it to your desired format (CSV, Excel, etc.). However, the main drawback is that manual conversion is time-consuming and error-prone for large or complex files. In contrast, DRS Softech ICS Converter is a dedicated tool that automates the process, enabling quick, accurate, and batch conversion of ICS files to multiple formats.