Disk Reserve is a personal storage buffer for iPhone and Mac — not a cleaner, not an optimizer. Reserve capacity before storage gets tight. Release it back in one tap when you need it. - Reserve: allocate real disk space as your buffer - Release: return it instantly, one tap - Dashboard: Available / Reserved / Used at a glance No scanning. No deleting other apps files. No optimization tricks. Just a buffer you control, like a spare fuel tank for storage.