OR...

Hold on a second... You said FOLDER... Sorry...

Easy

'Restore' your Outlook Express Window so that it covers less than half your screen... No need for accuracy

Double-Click on My Documents (This is an example, OK ?) or,
Double-Click on My Computer and then Double-Click on C:\ (probably)

'Restore', if necessary, so that whatever window is open is also about half of your screen...

The idea is to be able to see, at the same time, both the OE Window and A Window where you'd like to move the folder... OK ?

Now, RIGHT-Click and HOLD the Right-Click button down ON the folder you want to 'MOVE' (or 'COPY')

While you are HOLDING that Right button down, 'drag' the folder to the 'other window' where you want it to go... Either just in an 'open' area of the other Window or over a Folder where you may want it to go...

Now, RELEASE the Right button and a small pop-up window will appear asking you if you want to 'MOVE' or 'COPY' or a few other things...
For safety when you are learning this stuff, choose 'COPY'
(That way you won't blow out the 'original' if anything goes wrong...)

Takes seconds to do this... Ages to write it down !

Again... Other ways to do this stuff, but it would take even longer to write down the really easy ways to do this... Easier, but a bit more 'advanced'.