<p>I want to download a SRA data (SRA052842) with the prefetch command in command line of Ubuntu, The prefetch command is belonged to SAM tools package, so I&#39;ve used the following command:</p>

<pre>
<code>prefetch SRA052842
</code></pre>

<p>and I&#39;ve faced with following error:</p>

<pre>
<code>Maximum file size download limit is 20,971,520KB

2015-11-07T06:28:05 prefetch.2.3.5 err: path not found while resolving tree within virtual file system module - &#39;SRA052842&#39; cannot be found.
</code></pre>

<p>Where is the problem? How can I fixed it?</p>

You have two choices

1. Use http://www.sradownload.com

2. Use a FTP client program such as Filezilla under an anonymous identity
 - Just download and install the program
 - Create a new connection pointing at ftp-trace.ncbi.nhi.com as the server
 - Hit the advanced tab
 - Fill the remote directory with /sra/sra-instant/reads

And you will be allowed to choose your SRA data by Exp, Run, Sample and Study