I am sorry for that. In fact, Virtualization module is not available on iOS and it is really unfortunate...

You can take this example: Install Arduino IDE application. Don't allow this software to access Documents folder. When you first launch this software, it creates an Arduino folder in Documents folder. I don't think there is a security breach but it is not natural to see an application writing to Documents folder while you did not allow it to access there. My question is why Apple allows a process to write into a TCC restricted folder ?

Thanks for your answer. Are there other files format that can be handled by swift and that can be encrypted ?

Hello, i don't agree about APFS: For example, i can't create a 2 Tb empty dmg file with disk utility application. If i create a 64Gb file it takes a lot of time and i think disk utility is writing 64Gb of bytes on disk. Is there another filesystem or tool that can optimize disk space ? Thanks