Backup

Dear All

I am trying to understand backup in regards to full and incremental's! I know to some of you this might seem to be a stupid question but I would really like need to understand. I am using www.vembu.com as I like the fact I can backup to a local device and to the cloud for offsite backups In addition to this I can save more to the local device while setting the cloud side to lower retentions to save on storage space due to the cost of offsite storage. The total used storage space at present is 400GB

Current configuration onsite is as follows:

•Run this backup for every 1 Hour on Sun,Mon,Tue,Wed,Thu,Fri,Sat
•Configured to keep 30 restore points for a week
•Run additional full backup at 12.00 pm on First Sunday of Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec


I need to know how this works as I am at loss on what to tell the business, how much storage that will actually take up.

Can anyone help me?

Thanks