Open only the first file ( Mega_Database_2023.part01.rar or part1.rar ) using extraction software like WinRAR , 7-Zip (Windows), or The Unarchiver (Mac).
Example 3 (Categorization): Create a binary IsHighValueCustomer feature: 1 if TotalSpend > 1000, else 0 .
A "feature" in this context is usually a derived column based on existing data.