What happens if you can't AirDrop?

If you're unable to use AirDrop, what alternatives are available for sharing files wirelessly between Apple devices? Would Bluetooth be a viable option in such a scenario? Or perhaps there are third-party apps that facilitate this kind of functionality? Could email or cloud storage services be utilized as workarounds? Additionally, would it be possible to use a wired connection, such as a USB cable, to transfer files between devices? It would be helpful to understand the limitations and advantages of each method, as well as any potential security considerations that might arise.