I wouldn't recommend FAT32 for such a large drive. You'll regret that later on
NTFS is also a bad choice because of limited Linux write support...
I have heard that there are tools for Windows which let you access ext2 filesystems in Windows, maybe that would be a good solution! Anyway it would be a lot better to use this than to use FAT32!
I personally never used such a tool myself but I'm know it exists (Forgot the name, sorry...). Of course this will involve installing software on your Windows system, and I don't remember if the tool is free or not.