If you know what was inside the file (e.g., a specific album or a driver), search for the name of the content itself rather than the Zippyshare filename.
Since the original link is dead, you might be able to find the content elsewhere depending on what was inside the ZIP:
If this file was related to a specific niche (like gaming mods, music production, or software), search for "BG484.zip" on Reddit or specialized forums.