PROBLEM SOLVED.... what happens and the way the file is compressed, and this is only done in files that have been separated, if it is an entire upado file, it does not give that problem anymore, let's go to the solution.
I spent exactly 7 days trying to solve this problem to be able to play Ys VIII and Night Azure 2, I downloaded from so many places and so many forums that you have no idea.
several times and several places came with corrupted files, and sometimes not. but in both cases with no success in the installation I have an external hd (500gb xd ps4 original) I use for the installation of the games, and never had that problem. when it started I went after the solution and everyone says that the problem is in the corrupted file, this is a certain YES, but it is not because this update is corrupted and because at the time of download and extraction there was loss of packages causing its file to become corrupted .
so what to do?
1 - Download your game and extract it somewhere on your pc and check if winrar is corrupted if you download only that package and repeat the process until you are sure that none of the parts is corrupted.
1.1 - in the vast majority of my games this file already extracted I copied to the external hd and urged normal. try if we do not go to the next step
2 - if you have problem in the installation you copied from where you extracted to your hd. format your hd ALWAYS and every time this error is displayed. format it again to NTFS (fast) then to ExFat (fast) with me so solved so.
2.2 - whenever error FORMAT
3 - how you save your game is not corrupted by the way that was made the understanding and that is the EXACT problem now have to extract the game again so now you have to extract it directly to your EXTERNAL hd that you use to install the games in the ps4. you will see that it will say that there is a corrupted file that NTFS goes through and not the error. and then that you will download the file that is missing only this one. done this FORMAT again the outer hd, and have it drawn straight to it again. if it does not have any more corrupted data, it will complete the extraction on your external hd and you can install on your ps4 normally that will install in a good
Hope this helps