Each time you backup your community data, the TOPS Backup Service compresses your data to a smaller, more compact file size. This data compression is performed prior to the upload of your backup data, insuring that your backup data will be as small as possible. Data usually compress 20% to 40% of its original size.
Not only does this compression make backing up and restoring your data significantly faster, it also lowers the cost of your backup subscriptions. Since you pay for storage space used, the less space your data take up, the better. So, for example, an average community file taking up 10MB of disk space on your data server would compress to approximately 3MB.