Cross download - upload warning

[MrVon]

Professional web designers dont edit files on ftp. We create local project and upload it from local computer.

When editing file from ftp directly it might not upload properly if you have connection problem or the ftp has problem and sometimes it uploads blank and all contents are lost.
E.g you open file from ftp for editing in editor them saved and it uploaded to ftp, now you open it for next edit and old file in editor resets with new file which is blank and there is no way to undo...