A hydroaccumulator, in particular a bladder accumulator, includes a pressurized container and a separation element located in the container to separate a gas chamber lying adjacent to an inlet on the gas side from a fluid chamber lying adjacent to an inlet on the fluid side inlet, having a fluid connecting sleeve and a valve arrangement located in the connecting sleeve. Further, another object is to reduce writing voltage and erasing voltage while increase in the area of a memory transistor is suppressed. The method further includes, in a plurality of subsequent cycles, writing data to the static array; transferring data from static array to the active array, and reading data from the active array, wherein said writing data for each subsequent cycle is performed concurrently with reading data for a previous cycle.