1. A mobile data memory ( 10 ) having a memory device ( 32 ), wherein the mobile data memory is designed such that it can be used in an intrinsically safe manner in explosion-prone areas, wherein the memory device ( 32 ) has a first interface ( 12 ) and a second interface ( 14 ) for data exchange, wherein the second interface ( 14 ) is designed as intrinsically safe and for data exchange with a device and wherein the first interface ( 12 ) is designed for data exchange with data processing equipment.