AW: It can happen that the file system of the data medium is damaged or that the formatting of a data medium is lost due to aborted write cycles. The causes for this can be of various kinds, such as use or storage of the data medium, as well as problems with the initial formatting.

In these cases, you must format the data carrier with FAT32 on your PC or notebook. Info: If media content on the USB drive is still not recognized by the device after formatting, it may be due to an incompatibility of the data media controller chip. In such a case you should use another USB medium by another manufacturer brand.