You can update or delete files even though HPOFS is a write-once read-many (WORM) media format.
When a file is changed or deleted, a new version of the file is written, and the old version still exists on the media. This is true for both WORM and erasable media. The old file versions will always exist on WORM and will exist on erasable until the entire volume is reinitialized. When you change or delete a file, the system does not reclaim the space that was used by the old file. Media consumption continues to increase on HPOFS media until you reinitialize the volume (for erasable media). You can never reclaim deleted space for WORM
