I explained this to you in another thread a while back.
The various ways of checking your used storage for tvOS, either by app or Xcode, will not give you an accurate used and free storage size.
This is due to how it is calculated. It appears that temporary data, or cached data, is being included in the used storage amount.
tvOS caches a huge amount of data from things like games and video streams. If the OS needs more storage, it dumps temporary things like the cache, freeing up space to be used for other apps.
This is great for many reasons, such as going back to an app after a few days and being left off where you were before. The downside being is that you will never have an accurate free/used storage information.
BTW, the aerial screen savers is another thing that tvOS considers as temporary, and the OS will dump some if space is needed.
[doublepost=1568765308][/doublepost]Do you have concerns about running out of storage space?
If so, you should be fine. I have ran out of space on a 32GB ATV, but I also had a lot of apps with many being games.