Swissbit U-500 USB 3.1 embedded industrial USB flash drive module provides a robust, high performance, and reliable storage product with industry compatible interface and small form factor. The U-500 SLC technology both enables high NAND flash operation and excellent endurance. The use of page based Flash management and a global wear leveling extends the endurance to unprecedented values for USB products. The U-500 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.