My 16g USB size reduced to 38MB after make a usb installer for arch linux and failed
<p>Running on Ubuntu 14.04 and I used </p>

<pre><code>dd if=arch_linux.iso of=/dev/sdb  bs=4m
</code></pre>

<p>to create the installer.</p>

<p>However, after its finished and I ejected the usb drive, it gave me a error. The usb size displayed in property is 40MB since then.
I ran a lsblk to check my device:</p>

<pre><code>NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda      8:0    0 149.1G  0 disk 
├─sda1   8:1    0   512M  0 part /boot/efi
├─sda2   8:2    0 140.7G  0 part /
└─sda3   8:3    0   7.9G  0 part [SWAP]
sdb      8:16   1  14.9G  0 disk 
├─sdb1   8:17   1   724M  0 part 
└─sdb2   8:18   1    40M  0 part /media/william/ARCHISO_EFI
sr0     11:0    1  1024M  0 rom 
</code></pre>

<p>It can still be recognized as a 16g one.
I tried formatting it on a windows but it failed, and I tried using startup disk creator and erase it, it just showed "erasing",went on and on until I closed it
I tried </p>

<pre><code>sudo dd if=/dev/zero of=/dev/sdX
</code></pre>

<p>and no response either</p>

<p>How can I get my 16g space back?</p>