If you're developing a large course or just want to be supremely organized, then you'll want to use question banks! A question bank provides a storage facility for all of the questions within one course. Don't worry, you can pick and choose which questions go in the bank; once they're there, you can quickly pull them out of the bank and insert them or reuse them in your course as necessary.
To create a new question bank, you will need to return to Story View. Here you can select Question Banks and Create Question Bank.
You will first be prompted to enter the name of your question bank. Once you do so, you will be presented with the Question Bank screen. Once you have questions within your Storyline project, you can choose to import them by adding them from the Insert questions already in this project prompt link.
The Import Questions menu will appear, and you can select all questions you wish to add to your question bank.