Where are Postman collections saved?

It looks like Postman uses LevelDB. On Windows, I found my Postman DB located at:

C:\Users\xxxx\AppData\Roaming\Postman\IndexedDB\

According to Piere F, macOS users can find it under:

~/Library/Application Support/Postman/IndexedDB

ps: Note "~" is path for "/Users/userAccount/"

According to David, Ubuntu users can find it under:

~/.config/Postman/IndexedDB

Postman is using Chromium offline storage capabilities because at the end it's a SPA running inside Chromium (Electron technology).

From Postman's top menubar:

• Select View → Show Dev Tools
• Select the Application tab
• In the sidebar, open Storage → IndexedDB → postman - file:// → collection_requests

On Mac: The json files were automatically backed up (/Users//Library/Application Support/Postman/backup-YYYY-MM-DDTHH:mm:ss.SSSZ.json) but it is not documented anywhere. You just have to reimport them