You can use this tab to delete the Apple Double files. These files whose names begin with ._ are created by the system when an application adds resource data or metadata to a file on a volume whose format doesn’t natively support resources or metadata (such as MSDOS, NFS, SMB, WebDAV, or UFS).
Warning: Some rare files will be made unusable if their ._ AppleDouble file is deleted (for example, EPS files).
Click the Execute button to choose a volume or a folder, then click OK.
This operation takes a long time on a high–capacity volume. Wait for the task to finish.