Well Tiger Direct have 320GB HD for $79.00
If you can get a copy of the DOS 7.1 that was drifting around a while back, this should do all you want to do.
This is the features.
http://www.cn-dos.net/msdos71/whatsnew.htm
(You even get a MS-DOS splash screen)
Mount both drives in the same system and copy the files over.
Al.