how to transfer files from ipad to PC?

I'm trying to transfer files from my old iPad 2 to my PC before I do a reset so that the files are not lost

I cannot back the iPad up to iCloud as it won't recognize my Apple ID and Password

So, I need to directly access the files (music, documents) on the ipad to archive on my PC

I followed the advice on the Apple support page, downloaded and installed iTunes on my PC and connected the iPad via USB

The photo library was recognized and copied automatically by Windows

But when I started iTunes, it cannot see my iPad and does not give me the option to browse or move files

The Apple support article shows an image of the iTunes screen that shows a device icon but this is not present on my screen

Any thoughts on how to find my ipad in iTunes?

Failing that, are any of the 3rd party file managers for iPad useful?

thanks,

Mike