For recordings, these are meant to be re-imported into a BigBlueButton server for playback.

: "BBB" can also refer to Block-Based Backups used in enterprise software like Dell NetWorker. These backups are often compressed into archives for recovery purposes.

If you're comfortable sharing or what is inside it after extracting, I can give you a more specific guide on how to use its contents. Moodle in English: BBB plugin - recording files

If you see .vmdk or large disk image files, it is likely a server or block-based backup. :

For system backups, you may need recovery software like Dell NetWorker to restore the data.

: In older mobile forensics contexts, .bbb files were used for BlackBerry Desktop Manager backups. A .7z file might be a compressed container for these legacy backups. How to Access the Contents

: Use a tool like 7-Zip or WinRAR to open the .7z file. Identify File Types :