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What a WORM file is

The abbreviation WORM stands for "write once, read many." A WORM file has the property that data can be written only once to any area of the file and can never be overwritten or erased before the retention period expires.

After a file on a SnapLock volume is committed to the WORM state, there is only one attribute that can be modified—the retention date of the file can be extended. The retention period can never be shortened.