Dynamic storage of encoded data slices in multiple vaults

A non-transitory computer readable storage medium comprises:

• at least one memory section for storing operational instructions that, when executed by one or more computing devices of a storage network, cause the one or more computing devices to:
• error encode data into a set of encoded data slices;
• store the set of encoded data slices in first storage units of a first vault in accordance with first error encoding parameters;
• initiate storage of the set of encoded data slices in second storage units of a second vault in accordance with second error encoding parameters;
• and
• when a decode threshold number of encoded data slices of the set of encoded data slices are stored in the second vault, delete one or more encoded data slices of the set of encoded data slices stored in the first vault.