Google has updated the storage page with Android 15 Beta 2. The “System” option has been turned into a header. The OS and temporary files have been separated.

In Android 16 Beta 4, however, the disk can be resized to occupy most of the host device’s remaining storage, leaving 1GB free to prevent the virtual machine from consuming all available space.

Google's requirement states that 75% of the total storage on a device must be dedicated to the Android's main data partition, which comprises the operating system, apps, and user files.