Drive Atlas answers one question: which drive is that file on? Scan a drive once and search it forever, even when it’s unplugged on a shelf. If a file lives on several drives, it tells you which copy to grab. It also shows what has no backup anywhere, finds duplicates across drives, verifies backups on both ends, and tracks drive health. No account, no cloud, zero network connections. Windows and Linux. Free for 2 drives, $20 once.