Somebody told me about a software like xtree gold (msdos software)
I used it before but I don't recall it's name or how to install it.
xTree Gold is a dos based program where you can have two folders side by
side and work with them, like copy move etc.
I suppose most replies to your question will recommend mc, which is a
clone of Peter Norton's Midnight Commander.
If you are more keyboard or emacs-oriented, you can configure emacs to
appear as two side-by-side windows. This I prefer to mc, for several
reasons.
However, I use an application named FileCommander. The reason is that
I need process a large number of files quickly, and I've resigned
myself to the use of a mouse for that. FileCommander does the job very
well, although I doubt anyone else will mention it.
Haines Brown