Thanks for your reply.
Basically, I want to transfer psd files from desktop pc to iPad to work on away from desktop, then save and transfer back to desktop pc. My question is how to get them from pc to iPad and then back again.
My desktop pc plus internet connection are always temperamental which is why I want to do this without needing internet. However, the cloud wireless method was suggested again so I tried it. It just doesn't work when I try it, and something which I think should be simple and straightforward is turning into a technical nightmare.
So I just want to know how I can easily do this without internet connection. Surely this should be possible using a flash memory drive? I see they can be purchased online with a USB connection for pc and lightning connection for iPad. I have since posting thus found one which will get files into iPad Pro but not back again.