Ghost 14 bacups using all my HD space

Hello everyone! I’m new to NortonGhost. Never used anything like it before. I have always used Norton for internet protection. I installed Ghost without any issues and did my initial backup. I set the schedule to do a complete backup every week (incrementials every day). I noticed that after the very first backup I have these files on my external USB HD: File back up file with 20.5GB if fbffiles_2f3 (about 50 others like this), VProRecovery file, S11637.sv2i recovery environment. I know that S11637 is my computer BTW. S11637_C_Drive.001_i001.iv2i image file 184kb and S11637_C_Drive.v2i image file with 43.6GB. After 2 complete backups, the drive is almost full. I did remove the older backups to recover more space. My question is, howcome it takes up so much space each time? At this rate my drive will be full in a couple weeks! Is there some way to change this? Thanks in advance! Jeff