If you get an "Access Denied" error:
Before diving into solutions, it's important to understand what CHKDSK does and why external drives pose unique challenges. CHKDSK is a Windows utility that scans file system integrity, finds bad sectors, and repairs logical errors. When you run chkdsk X: /f (where X is your drive letter), Windows attempts to lock the drive for exclusive access. chkdsk on external drive fix
Always use "Safely Remove Hardware" before unplugging. Forceful removal is the leading cause of file system corruption. If you get an "Access Denied" error: Before