You can use the Check In option on the ribbon to add files to the vault.
Use Check In when you are ready to check files into the vault for the first time. In addition, use Check In when you are done working on an Autodesk Navisworks file that has been checked out of the vault; check the file back into the vault to store the changes with the new version history. Include a comment with the file describing the changes made to this version of the data when checking it in. The latest version of a file in the vault is the last version that was checked in. Once a file is checked in, the version in the vault is incremented and the latest changes are now available for others to check out.
Only one person can have a file checked out at one time. If you want to make a file currently checked out to you available to others without recording your changes, you can Undo Check Out. If no changes were made to a file that is checked back into the vault, the version history is not incremented. You can launch the Autodesk Vault client application to see who has a file checked out. The person to whom a file is checked out will be listed in the User Name column.