We call folders in your Drive that weren’t mined onto Arweave “Ghost” folders. This was largely an issue before the ANS104 Bundling Standard was introduced to ArDrive web & ArDrive CLI. The ArDrive web app is now capable of recreating these folders & rescuing your orphaned files.
Orphaned Files are files mined to Arweave but not visible on ArDrive.
The Orphan Fixer feature will recreate any orphaned folders found in your Drive.