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EDIT: Can you plug in the USB, open Thunar file manager and look to see if it shows up under "/mnt"? If yes, see if you can save something to it.
Can you open GParted and do Device -> Create Partition Table -> "msdos"; then make a new FAT32 partition that covers whole disk?
Just to be sure I know exactly what has happened, are you saying that you re-ran dd command (with fixed "bs=4K") and it only took 16 minutes?
The GParted pic you posted -- is that what it looked like after zeroing out? Or did you add that FAT32 partition to it yourself?
As far as your error message goes, can you tell us exactly how you are trying to mount the drive? What are the exact steps you're trying?
Have seen posts like this before and only thing that ended up working was to zero out USB with dd first, then reformat. Might as well give it a shot.Plug USB in and make sure you know which device name is assigned to it. If sudo blkid doesn't show it, open GParted and find out the name from there. (Then close GParted.) For this example I'll use "/dev/sdb" for name of USB. If that's not correct for you, change it in command below.To write zeros to whole USB, open a terminal and enter this command:Code: [Select]dd if=/dev/zero of=/dev/sdb bs=4k conv=notruncWait until it completes (could take many minutes), then unplug drive.Plug drive back in, open GParted -- create new "msdos" partition table, then make partition(s) you want on it.Hopefully that works.
dd if=/dev/zero of=/dev/sdb bs=4k conv=notrunc
sudo dd if=/dev/zero of=/dev/sdb bs=4K conv=notrunc