Online RootFS growth
On growth-enabled images, Sandbox0 automatically expands the writable RootFS as free space runs low, within a configured sparse logical ceiling up to 64 TiB. Agent processes keep running. Growth is enabled in the qualified Cloud region; confirm activation for other regions. Existing images and snapshots retain their captured storage geometry. The ceiling is logical capacity, not preallocated host disk.
The retained Windows server already preserves its installed system disk. The quoted server/license model does not establish integrated automatic online low-space growth of the whole durable OS filesystem; verify any plan/disk resize workflow separately.