rem Extract to the current directory unrar x filename.part01.rar
However, .rar files are (compressed), not plain text files. A .part11.rar filename suggests this is part of a multi-part RAR archive (e.g., part1, part2, …, part11). FC2-PPV-4434335.part11.rar
: If this is a multi-part archive, ensure that it extracts correctly and isn't corrupted. rem Extract to the current directory unrar x filename