The flash drive is divided into two partitions. Only the partiton named ''PUBLIC'' is directly accessible. To access the second partition, named "SECURE", you must start the EmtecSecurity application. Please note that the 1st batch of production of X600 and S600 had an equivalent partition size by default between Public and Secure. That's why several customers tought that their USB flash drive only had half of its capacity available. To avoid this issue in the future, please note that all coming new S600 and X600 will have their full capacity in their public partition by default.