The hardware if the 4th gens is pretty weak FWIW. It really doesn’t have a lot of processing power and as far as I can tell probably only 1 GB of RAM. For most users/use cases, this is more than sufficient to run a couple streams and manage a TB or two of recordings, this also helped them reach the low price point (half the price of the legacy models).
Doesn’t seem too far-fetched to me that it struggles loading/managing the database for 4+ TB of recordings. But have no fear, Tablo Desktop Player is here 