You can combine multiple drives to create a single volume to store data in one place, and here's how you can set this up on Windows 11.

To change default hard drive from C: to D: in Windows 11/10, change the default save location for apps and files, move user folders to D:, etc.

To format an external drive using the Apple Files app: Connect the storage drive you want to format to your iPhone or iPad's charging port directly or with an appropriate adapter.