The text of the message for error CE-41902-6 states: “External hard drive error. Unsupported disk.” Unfortunately, this is true, the problem really lies in the external HDD. True, this does not always mean that your drive is broken, often a failure is easy to fix in just a few seconds. If you are not lucky, you will have to change the hard drive, but we hope that it will not come to that.
What should be done?
Although it is trite, you should try to fix the connector. You need to make sure that the USB plug is firmly installed in the connector and there is no extraneous play. Another similar approach is to switch the external hard drive to a different port. About half the time, this simple tactic works.
If the drive is connected well, but still shows error CE-41902-6, it may have bad sectors. We recommend connecting the hard drive to the computer and scanning it. There are many programs that analyze the Smart part of the drive and even allow you to fix some damage. For example, you can disable the use of bad sectors and continue to use the HDD for quite some time. You can try Victoria, HDD Health, HDDLife, but often branded programs from the hard drive manufacturer give the best results. Additionally, we recommend formatting.
If all else fails, the only thing left is to replace the hard drive. We came across when a new HDD provoked a similar error. It was quite cheap and after parsing it turned out that inside was just a flash drive and a couple of sand slabs for weight. The old disk, most likely, has simply outlived its usefulness and it’s time to replace it. Fortunately, it’s easy to test the theory by connecting another drive.