The default unit is bytes and can be overridden using `@DataSizeUnit` as illustrated in the sample above.
TIP: If you are upgrading from a previous version that is simply using `Long` to express the size, make sure to define the unit (using `@DataSizeUnit`) if it isn't bytes alongside the switch to `DataSize`.
TIP: If you are upgrading a `Long` property, make sure to define the unit (using `@DataSizeUnit`) if it isn't bytes.
Doing so gives a transparent upgrade path while supporting a much richer format.
