If you have ever accessed your website using a network protocol such as the Apple Filing Protocol (AFP), Samba (SMB), Web-based Distributed Authoring and Versioning (WebDAV), or Network File System (NFS) using your Mac – I am sure you have run into this problem before – dreaded invisible resource fork files. These are the files that begin with a ._ and they are normally not seen from within the finder. My understanding is that these files are not even created on your local Mac hard drive since the HFS+ file system is smart enough to keep your data and resource forks together in one single file. But even if you are accessing your website from one Mac HFS+ volume to another Mac HFS+ volume, these files will still be created by programs like DreamWeaver and TextMate because the various protocols to access that remote share and/or the file systems themselves will need to split them to cope. So ultimately when ever you use these other types of file systems or network protocols, you will eventually be creating lost of invisible resource fork files.