It sounds like the backup is complaining about the file size limit rather than the drive size.
First off, your link’s a little broken:
I’d do this:
- Hook up the drive.
- Go to “My Computer” (well, ok, “Computer” based on your desktop screenshot), right-click the external drive and go to “Properties”.
- Check the “File System” property on the external drive. If it’s FAT32, then the largest size file that can be stored is 4 GB (although it supports drives capacity up to 2 Terabytes).
From there, I can think of two options. First, can the backup utility “span” the backup across multiple files? If you can pick a “max size”, pick around 3-4GB.
The second option is to reformat the external drive to use NTFS, which can support files up to the capacity of the drive. Make sure there’s nothing on the drive you want to keep. Then, from “My Computer”, right-click on the drive, select “Format…”, and select “NTFS” in the “File system” drop-down. You might be able to select “Quick format” to speed things up, although I’m not 100% sure if that’s going to be an option when switching the type of file system.
And on preview, what Nanoda said. And he/she remembered that NTFS won’t be able to be read by Win 9x machines, which I didn’t think to mention.