Resolved 'Roaming' subdirectory

I have used a desktop since 1982 and was used to knowing what every file on my computer was for and organising everything into Drives, folders and sub-folders. I find the present system confusing.

Having got straight in my mind the 'Documents" directory (in Libraries) and placed in on another drive from C:\ I find it weird that the Public documents cannot be placed on to another (and therefore safer) drive as well.

Then I find I have Username(Diana)\Appdata\Roaming which appears to contain info on installed software. - what is "Roaming "? - still on my C:\drive
Immediately under that is "Application Data" to which 'access is denied' no matter how I alter the permissions but which I imagine is still on C:\. What is this?

 

Thanks for help

Thank you - your suggestion did not actually remove the Roaming sub-directory from the listing but now I understand. It did remove a number of other things I was wondering about however.

Brought up in original DOS days when one knew what every file was on your disk I find the My Document idea confusing and tend to give it the blind eye!