JDoyle 0 Newbie Poster

Hello, has anyone any ideas about .tmp files being created when saving illustrator files and .qxp files being created when saving Quark Xpress files on a mac Xraid. And why a message when trying to save some files, particularly Photoshop files, that says "file already open for writing" so I save to my desktop and then try to move the file back on the Xraid and overwrite the now "old" file, but a message says I dont have the right privileges and when I try to delete the "old" file on the Xraid it says it is busy?