Thanks yes.
I have managed through advice in the forum to make some registry changes so that my documents and pictures are all go to my personal folders, not to OneDrive.
I have then got rid of OneDrive by uninstalling this from my system - I have also deleted MS 365/Office and all files associated with this, I will use Libre Office/Gimp etc. going forward.
I had previously managed to copy most of my documents and pictures to a separate hard drive although some may have been lost because the stupid OneDrive limit was exceeded when Microsoft tampered with the system. I now know how to switch it all back again if a future update tries to revert to the One Drive app.
I have lost a lot of music patches for hardware guitar processors and DAWs - but this is not a professional loss, I am finding some of these files and reinstating some of these one by one.
What a pain - why do Microsoft do this? All the goodwill that could be extracted by providing a great update from Win 10 to Win 11 and they blow it completely by forcing something like this on us.
My system working perfectly now - all photos and documents copied automatically onto my NAS drive now plus a weekly backup.
Thanks again for your help and that of everyone else who responded.