You can purchase an external drive that already comes in an enclosure
such as Western Digital's MyBook or Maxtor's OneTouch. You won't find
any external hard drives as small as 10GB - they usually start at 200GB
and go up from there. Or you can purchase a hard drive enclosure and put
any IDE hard drive inside.
You may need to install True Image on a Windows XP or Vista machine - I
don't know if it is supported on Win98 any more. Once you have the
program installed, you create a bootable CD and use that to boot the
target computer with the external hard drive attached. The image is
created outside of the operating system.
However, Windows 98 is so old that I don't know if your computer will
support seeing the USB external hard drive attached outside of the
operating system. I'm not saying it won't; I'm saying I don't know and
my Win98 machine went to that Big Silicon Heaven a long time ago. A
better solution for you might be to use a hard drive enclosure with a
smallish (40-60GB) hard drive inside which you format FAT32. Attach that
to your Windows 98 machine and back up your data.
Someone else will need to answer your questions about whether True Image
(or Norton Ghost) will work with Win98. Or you could just go to the
products' respective websites and find the answer.
If none of that works (you might not even have a CD burner for all I
know - lots of old Win98 machines didn't), pull the drive and slave it
in a Windows XP/Vista machine and pull the data off that way.
You might want to post further questions about this subject in a Win98
newsgroup since this one is for Vista.
Malke
--
Elephant Boy Computers
www.elephantboycomputers.com
"Don't Panic!"
MS-MVP Windows - Shell/User