There is really no change in how recordings are stored/removed from the TiVo unit since the "addition" of the RD folder. The only change is that NOW you can "see" the deleted files and can still recover them as long as they haven't been overwritten. It works the same as the hard drive on a computer. When you delete a file, it is STILL there on the hard drive. ONLY the link to the file name has been removed. You can get "undelete utilities" that will display all the deleted files that haven't yet been overwritten, and you can recover them. The "Recycle Bin" in Windows works in a similar manner, except that you don't need special software to recover the deleted files. Let's say that you have a 100 GB hard drive that is half full. You continue adding and deleting files to your hard drive, maintaining the 50 GB of "free" space on the drive. The "deleted" files go to the recycle bin. Now, when you have added/deleted another 50 GB of files on the drive, the drive will be "full" even tho it shows that it is 50% full. Add ANOTHER file to this drive and it will have to "bump" a file from the recycle bin. THAT is basically what the TiVo unit does. When you have recorded a total of 80 GB (on the DT80 unit) the drive is "full". It doesn't MATTER whether you have deleted half of these recordings. BUT the "deleted" recordings have NO PROTECTION when you try to record something ELSE on the unit, and one or more of them will be "overwritten" to make room for the new recording, and will no longer be available to "recover". As for your specific query, unless there is something wrong with the way the software works or with the TiVo's setup, programs SHOULD be overwritten from the RD folder before those marked "until space needed" are touched. In fact, IF one of the "until space needed" programs is deleted by a new recording, it would go to the RD folder, and one of the RD folder programs would STILL need to be bumped!!! I guess like any "new" technology that is constantly evolving, there are going to be bugs to be worked out as they appear to customers. And the only way that the folks at TiVo can KNOW of these bugs or problems is through customers like us bringing them to their attention!