Swissbit U-56 USB 3.1 embedded USB module provides a robust, high performance, and reliable storage product with industry compatible interface and small form factor. The U-56 pSLC technology offers superior performance and is the best compromise between endurance and cost. The use of page based Flash management and a global wear leveling extends the endurance to unprecedented values for USB products. The U-56 firmware includes data care management features which refresh storage areas that are not or only infrequently read. At high temperature storage these areas are prone to retention loss. The firmware monitors the state of the NAND blocks and refreshes those that show a high level of degradation, thus preventing uncorrectable errors. This is an important feature for USB modules that are used as read only boot media.