Backup considerably smaller than original profile

I have been using TEBE successfully (so I think, anyway) and really appreciate the program. I just had a major meltdown and as a result ending up losing all TB data for a ten day period so I am a bit paranoid... As a result I have been backing up two or three times a day…
For example, todays results:
Original profile is 9.10 GB.
TEBE backup is 5.49 GB.
The TEBE backup file is nearly 4 GB smaller than the original. Is this normal? I have selected “Full Profile” backup.
Any input would be appreciated. I am doing a manual backup of my profile nightly to make sure….
For example, todays results:
Original profile is 9.10 GB.
- Original profile
- original.tif (162.87 KiB) Viewed 8309 times
TEBE backup is 5.49 GB.
- TEBE Backup
- TEBE backup.tif (111.5 KiB) Viewed 8309 times
The TEBE backup file is nearly 4 GB smaller than the original. Is this normal? I have selected “Full Profile” backup.
Any input would be appreciated. I am doing a manual backup of my profile nightly to make sure….