stands for "Update." In piracy circles, an "UPD" post means:

Approx. 96 minutes, featuring restored footage cut to meet the original "R" rating. Risks of Using Pirate Sites like Isaidub

: Isaidub is a third-party site often used for downloading dubbed content. Be aware that such sites often host copyrighted material without authorization and may contain intrusive advertisements or security risks. (like 720p or 1080p) or a different movie in the Saw franchise? Saw IV: Unrated Director's Cut - DISH Anywhere