TempDir
When processing uploaded files, if Movable Type notices that the file you uploaded already exists, it will allow you to overwrite the original file by first asking for your confirmation. To do this, MT needs to write the uploaded data to a temporary file. That temporary file is stored in the directory specified by the TempDir setting.
Default value: /tmp
Example ΒΆ
TempDir /other_tmp_dir

Rick
April 13, 2009 1:01 PM | Reply
Another way Movable Type uses the temp directory is for backups. So if you want your backups to go to another directory, change the default TempDir in mt-config.cgi .