You don't state whether your first drive is already FAT32 nor your Operating System: FAT32 is supported (MS doesn't technically support it and refers you to your OEM vendor) on Win95 OSR2 (ver 4.00.1111) and later. Win98 and Second Edition support FAT32 by default. If your first drive is FAT32, continue. If not, your Windows version (type VER at MS-DOS prompt window) must be 4.00.1111 or greater and you will need more detailed help.
For Win98(or Win98SE):
Click Start Button
Select Accessories Menu
Select System Tools Menu
Select FAT32 converter; if not there, open Control Panel, then open Add/Remove Programs icon and select Windows Setup tab, then highlight System Tools and click Details button.
Check FAT32 converter, then OK button. You may need your Win98 CD if the setup files weren't installed on your hard disk.
For Win95 OSR2 and greater, I suggest you manually repartion/reformat the drive. If you need to go this route,
seek help again here.