Please note that I am not endorsing this advice, I am not competent enough to judge. Maybe it’s good. Maybe not so much. Possibly other people will chime in.
In about 12M because you gave that as the longest timeframe to be protected.
Backup protection provides ability to restore an old file even if file got deleted.
If you’re certain you want a file gone now, it’s possible to force it to be purged.
What was confusing to me was the last sentence in “Over time backups will be deleted automatically. There will remain one backup for each of the last 7 days, each of the last 4 weeks, each of the last 12 months. There will always be at least one remaining backup.”
If the file is gone after 12M, how is there one remaining backup?
In the first step, select the restore point from which you want to restore some files by selecting a date and time behind Restore from. Each restore point will list all files and folders included in the backup exactly as they were at the listed timestamp.
So the “remaining backup” says you’ll have one you can choose from. Chances are that it’ll be recent.