Is it safe to store private files in a folder on the web server if I chmod the folder to 4700 (Owner=all, everyone else=none)? This would make them only accessible by me, if I login via sftp/ftp, right?
I wouldn't recommend keeping private files anywhere unprotected(unencrypted) with password. Many websites promise users they will never share any of their information and data, but you never know what can happen with your file.