[knc1]

Are the three "spoilers" included in your most recent post suppose to represent things you did, in the order you did them?

For instance, "spoiler 1" reads a lot more like the result of trying to format (or other write activity) the device discovered as sdc.
Not all of that as the result of plugging in the cable.

Please clearify what messages are the result of what actions.

With all of the device errors shown in "spoiler 1" -
What did you have in mind trying to format it in "spoiler 2"?
Was there some reason to doubt the errors being reported in "spoiler 1"?

Then in "spoiler 3" you try to use the dd command to over-write the contents of a partiton, including any formatting recorded there.

The dd command works at the device level, not the file system level. You can read that in your own command where you have to use the name of a device rather than the name of a mounted file system.

So if your command in "spoiler 3" had worked, even a little bit, it would have made your efforts shown in "spoiler 2" a waste of time.

But since "spoiler 1" reported that the device wasn't working properly - what did you expect to achive by not finding and fixing the cause of that problem before continueing?