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AppleDouble

You can use the AppleDouble pane of the Files toolbar item to delete the AppleDouble files.

These files (whose names begin with "._") are created by the computer when an application adds resource data or metadata to a file on a disk whose format doesn’t natively support resources or metadata (such as MS-DOS, 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 Select button to select a disk or a folder; then click OK.

This operation takes a long time on a high–capacity disk. Wait for the task to finish.