Connecting iPad to Computer

First, your iPad Air4 does not have a Lightning port - but instead has a USB-C connector. As such, for connecting your iPad Air4 to a computer, any cable with a Lightning connector on either end is of no use whatsoever.

Many recent Windows PC or Mac computers will have one or more USB-C ports like your iPad. For these computers, you can connect your iPad to the computer using the USB-C to USB-C charging/data cable that was provided in the box with your iPad and Power Adapter.

If your computer only has the older (rectangular) USB Type-A ports, as is perhaps very likely to be the case, you simply require a certified USB Type-A to USB-C cable. These are readily available from good computer stores - and from Apple. Apple market a suitable cable manufactured by mophie:

• mophie USB-A Cable with USB-C Connector (1 m)

https://store.apple.com/uk/xc/product/HN892ZM/A

For info, Mophie (a respected Zagg brand) also have their own website from where you can order cables and other accessories for your iPad.

You should avoid the use of simple cable adapters - as these are not USB-C certified.

if your computer have the new usb-c ports it's this one USB-C to Lightning Cable (1 m) - Apple

if your computer have the older usb-a ports it's this one Lightning to USB Cable (1 m) - Apple

if your cable is an usb-c cable but you don't have an usb-c port in your computer you can get an adaptor

Amazon.com : usb-c adapter

Kindle? iPad?

Now that you can connect the iPad Air with your computer, using the USB Type-A to USB-C cable, you can troubleshoot any other connection issues. If your iPad is not recognised by your Windows PC, this support page should help with identifying the problem:

If your computer doesn't recognize your iPhone or iPad - Apple Support

Look up the specs for iPad Air 4th generation and for your computer.