A:AnswerYes, you can use a thumb drive to the USB-c type connection with an USB-c to USB adapter. Or you can buy a usb/usb-c combo thimb drive. I’ve been able to connect anything with my adapter such as my memory card reader and you can see them in your files app.
A:AnswerOnly the virtual keyboard is included with a purchase and in my opinion works very well. Bluetooth keyboards or those that can be connected to the iPad Air 4’s Smart Connectors can be purchased separately.