Manual:$wgUploadDirectory/de

Details
Der Dateisystempfad des Ordners in dem die hochgeladenen Datei gespeichert werden.

Dieser Ort muss vom Webserver beschreibbar sein. See Manual:Configuring file uploads#Check directory security.

By default, uploaded files are actually stored in subfolders of $wgUploadDirectory. See Manual:Configuring file uploads#Upload directory for information, and how to disable this behavior.

There are other variables which are defined relative to this one. If you redefine this in your  then all dependent variables including   will need redefining also. If both these settings are not coherent the files will be uploaded to different folder than from where MediaWiki will try to retrieve it for viewing !