不需要对typo3/的写权限.仅当您要安装系统扩展名(不应该执行此操作)以及安装工具可能会创建的某些.htaccess文件(手动创建它们，或随后更改权限)时才需要.

There is no need for write permissions on typo3/. This is only needed, if you want to install an system extension (what you should not do) and for some .htaccess files which could be created by the install tool (create them by hand, or change permissions afterwards).

通常，您的FTP用户和Web服务器用户不同.因此，它们应该在同一组中.因此，您需要将权限设置为0770(目录)和0660(文件)，以便可以通过FTP上传文件并通过TYPO3编辑它们.否则，您将使用0630通过FTP上传文件-您将无法通过TYPO3删除该文件.

Usually your FTP-User and your Webserver-User are different. So they should be in the same group. So you need to set permissions to 0770 (directorys) and 0660 (files) so you can upload files via FTP and edit them via TYPO3. Otherwise you upload an file via FTP with 0630 - and you will not be able to delete that file via TYPO3.