AW: It may have happened that the file system of the disk was damaged, or that the file allocation table of a data carrier is defect due to erroneous write cycles.

In such cases, you must format the data carrier again to make it work correctly.

Info: If the data carrier after formatting is still not recognized by the device, it may be due to an incompatibility of the disk controller chip itself. In such a case, you should use a different USB data carrier of another brand or manufacturer.