AW: It may happen that the file system of the disk got damaged, or that the file allocation table of a data carrier is defect due to erroneous write cycles. There may be different reason for this to happen, such as usage or storage of data carriers and problems occurring at the initial format process.

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.