FTP
553 File Name Not Allowed
Requested action not taken. File name not allowed. The file or directory name violates the server's naming rules or filesystem restrictions.
When You See This Code
When you try to create or rename a file with characters the server's filesystem does not allow, such as special characters or reserved names.
How to Fix
Rename the file to use only allowed characters. Avoid special characters like ?, *, |, <, >, and leading/trailing spaces or dots.