Hi Brink,
Great stepthrough, many thanks
After successfully moving the My documents folders to a larger partition, I have one issue remaining however...
My old user folder on the C: drive now contains separate Music, Pictures and Videos folders to the ones that I moved, which are also appearing.
When I try to access these (presumably empty) folders I'm getting "C:Users\Phil\Pictures is not accessible. Access is denied."
I don't need these, is there any problem with just deleting them?