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.
Linode already retains the full Linux disk and can automatically resize an eligible primary disk during a larger-plan migration. Warm resize reboots at completion. Sandbox0 integrates low-space-triggered online whole-RootFS growth rather than uniquely providing persistence or disk expansion.