I relate this story in case others are in my position and don't want to lose recordings that have no reason to be deleted.
I installed 20.2.2 today.
Before that, I had a number of recordings that were expired. Disk usage was 92%. I have most recordings KUID. So not all future recordings were scheduled to record because of a future disk space problem. (You don't need to tell me I'm doing it "wrong". I'm doing it this way for my own reasons.)
After the install, I noticed my disk usage was 87%. I puzzled over that until I realize that all my expired recordings had been deleted.
For instance, "This show was deleted because space was needed to record other shows on 10/30 at 10:49pm".
But space wasn't needed. I still have about 50 recordings in the deleted folder.
So I believe there is an error in the new software that deletes expired recordings even when the space is not needed. I'm hoping this is one-time only at the install, rather than a continuing issue.
And my main reason for mentioning this is to give others in my situation a chance to change expired recordings that they may want to watch so they aren't deleted during the install.