Use 7-Zip , the official free and open-source tool for this format.

The numeric string "49204141" often corresponds to a user or page ID, while the longer middle string is a unique content ID. The suffix _n is typical for standard-resolution images or videos from Meta's platforms. 📁 How to Open the File

To view the contents of this archive, you will need a utility that supports the .7z format.

"Just unearthed an old archive from the vault! 📦 Check out the raw assets in 49204141_2831112003685631_8359515808752535149_n.7z —perfect for anyone needing high-res social media backups. Download the latest 7-Zip to unpack it!"