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This could indicate either that (A) your flash drive has a bad memory controller or other physical problem and is toast or (B) it is physically fine however someone used a low-level device tool and mistakenly wrote the incorrect block size onto the drive. You can check if the drive is bad after you attempt to correct the block size. (my examples use sdc but your assignment might be different!) sudo dd if=/dev/zero of=/dev/sdc bs=2048 count=32 && syncThis will clear the Master Boot Record.Result on a 16GB drive: # fdisk -l /dev/sdc Disk /dev/sdc: 14.6 GiB, 15640600576 bytes, 30548048 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes[[Category:Solid_State_Media]]