You work for a healthcare provider that uses an external medical billing company to manage...

Creating a shared drive and granting Contributor access to the billing company’s staff allows them to view and edit documents, but not delete them. This is the most suitable approach because it ensures that only your organization's employees manage the overall shared drive, while still allowing external users to collaborate on documents without compromising their integrity by preventing deletion. The shared drive structure also offers better control over document permissions compared to shared folders.