If you're a solo user on Windows looking for a modern file management experience, go for Files. Its sleek WinUI 3 interface, tabbed browsing, and dual panes provide a fresh alternative to the standard File Explorer, with additional features like tagging that enhance organization. However, if you need cross-platform support or require advanced scripting capabilities, steer clear and look elsewhere.
On the other hand, if you're part of a business that handles a high volume of PDFs and requires a secure processing environment, choose Stirling-PDF. It offers robust functionalities for document management across multiple platforms, despite the potential costs associated with its paid model based on usage. However, if a fully-featured mobile experience is crucial for you or if you're seeking a completely free solution without any limits, this tool may not meet your needs.