PS4 storage space full, even though 100GB are available?

I have already looked up on the Internet what can be the reason why my PS4 says that there's no more space, although there's still 100GB free in the memory.

Result: The PS4 reserves space for system updates and more.

But 100GB? Others were 50GB or 80GB. One answer also said that the more storage space you have, the more storage space the PS4 reserves. But the others all had 2TB and I only have 500GB. The thing is, I just want to download a game that takes 10GB away.

And no, my recording library is empty!

Looking forward to your answers!

So if your library is empty there must be some error. Otherwise I would have said delete the games you do not need. Have you restarted yet? And if that doesn't help, I would get an external hard drive. Lg

I only have 7 games on it that I all play.

What I can recommend is to buy an external USB hard drive. Because 500Gb is pretty little. But I haven't really heard that yet. It may also be that the game is slightly larger than specified due to dlc or the like