Mac - External hard drive backups

I have two external hard drives, WD 320GB and a WD 1TB.

I would like to backup my WD 320GB on a regular basis. Please could you inform me of a good application which could provide these needs:

• Backup compression (not just copy and pasting the files)
• Support for FAT-32
• Possibly scheduling
• The external hard drives are in a FAT-32 format because they are sometimes used on a windows computer.

I have used Get Backup and it doesn't seem to work, as it has an error about copying files with the same name but different extensions

Thanks