Hi buxz777.
You can use the default file manager for moving files between folders, but only in MyDocs folders (File Manager do not have access to system folders).

For example, if you want to move from Documents to Sounds the happy.mp3 file:

- Using the default File Manager:
Open it, than find your Documents folder. Right click (hold your finger) on happy.mp3, then select move and the Sounds folder as destination.

-Using X-Term:
You do not have to use sudo gainroot for moving files in non-system folders.
Type

cd/MyDocs/.documents/

Then

mv happy.mp3 /home/user/MyDocs/.sounds

For system folders you can use OpenSSH and WinSCP on your PC.