I have a backup plan for each day of the week (Monday - Thursday) with each day backed up to a different removal HDD. Our goal is to keep 3 months of backups (i.e. 12-15 Monday BUs on the "Monday" HDD etc). To minimize the BU size, I want the daily plan for the next week to only backup files that have changed during the previous 7 days. To achieve this do i need to check the Advanced Filter "Back up objects modified since" box and the date every week. or will will the software know to just copy the files that have changed within the last week? Or, is there a better option?

Also, should the Schedule be set to for "Recurring (selected day) and "Execute full backup" so that any new folders and subfolders are included?