Если знаете букву, на которую начинается нужное расширение - выберите ее.

.R30 расширение

Расширение формат файла «.r30»
Тип файла WinRAR Split Archive Part 30
Разработчик Eugene Roshal
Категория Сжатые файлы

Описание формата файла

File used as part of a multi-volume compressed RAR archive; contains compressed file contents as part of a larger archive; can be reconstructed with the other compressed parts back into the original file.

RXX files, where "XX" is a number from 00 to 99, are usually created to save a large archive on multiple disks. File archives using the ".rxx" file extensions format may be created using RAR for Mac and Unix or WinRAR for Windows.

NOTE: The WinRAR software installer registers file associations for the file extensions .R00 - R29, but it does not register associations for R30 and beyond. Therefore, you may see a WinRAR icon for R00 - R29 files but not for R30 files, even though WinRAR can still open R30 files that are part of a split archive.

Программы, которыми можно открыть файл .R30