of split RAR files or how to fix a "checksum error" during extraction?

Are you trying to a file into parts and need the settings?

KVA-5N-73L-0F4

She thought of the museum’s founder, Dr. Leclerc, who had once said, “History is a chain. Break one link, and the whole thing collapses.” She also remembered the anonymous sender’s final note: You’ve been waiting for this. Was this a test? A trap? Or a plea for someone to finish what the original creators had started?