Open two instances of Explorer. To tile them right click on the lower task bar in an empty space. You can from the menu that pops up select to tile the two Explorers either horizontally or vertically. I like vertically. Make sure no other programs are open or they will become tiled also.
Locate the folder on the hard drive you wish to copy from. In the other Explorer locate your second hard disk drive.
With your mouse cursor over the folder you wish to copy, first hold down the CONTROL key. Then with your mouse left click on it and drag it to the other hard drive. If you already have a folder you wish to copy those files to just drag the folder name over that folder and let go of the mouse. All your files will automatically copy to the second drive into that folder. That will even copy all sub folders under the main folder you are copying.
Experiment a couple times to see how that works. You will find it works very smoothly and perfectly.
Using my above technique I copied a hard drive folder that had 50 megs of photos in sub photos onto an LS-120 120 meg disk. I selected the folder the photos were in. Then holding down the Control key I dragged the main folder over to where the LS-120 drive was located. I let go of the Control key and I could see on screen as each photo folder, each photo, each sub folders were copied like magic. All my photos ended up in the same sub folders names they were originally in on my hard drive. I smiled as I watched my computer do all the work and watched it happen on screen.
If you want to copy only certain files you can hold down the Control key and select only the files you wish to drag to the other hard drive folder. You can skip some files you do not want copied.
That should work from Win 98/SE and ME / XP, and Win 2000. Don't remember if it worked that way in Win95.