Request for backup plan David thanks for your reply. Since you split the year in 2 X six months what I understand is to do 2 plans for 6 months term. I thought that in order to have GFS. By using plan with GFS as well as with immutability in retention tab there is a warning" Enabled GFS period of keeping weekly full backups requires a scheduled full backup at least once a week. If necessary, change your backup schedule."
Is this valid or has changed, what I say is can I do full once a month using GFS ? Lastly what is the best option having 6 months full backups? For example keep backup for 2 Weeks, keeping weekly for 4 Weeks and 6 monthly would it satisfy the GFS?