We always used to do a daily backup, but Sundays we did a weekly one. Daily backups (ie. Mon-Sat) were kept 7 days, Sunday backups were on a 4-week cycle.
And, of course, we actually backed up to somewhere else... not to the same system, as your script appears to do. You could make it 8-weekly or something, if you think it will take you time to "discover problems", but we tended to find 4 weeks was sufficient. Sean
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