Contrary to what many new users think, P30download does not use a universal static password. Instead, each post has its own password. Here is the standard logic:
The .upd extension is not a standard Windows file type. However, on P30download.com, it has become a proprietary pseudo-format used by their internal cracking tools. p30downloadcom+password+upd
In most cases, the UPD file is not an update file in the traditional sense (like a software patch). Instead, it is one of the following: Contrary to what many new users think, P30download
If the default password doesn’t work, the uploader may have changed it. Check the description section on the p30download.com page—sometimes the password is hidden in a text file, another download link, or a sticky comment. However, on P30download
You’ll usually get a single .rar or .zip file. Do not rename it.