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copied!<p>You can't! Usual limit is 5 mb.</p> <p>Some browser such as Opera allow you to adjust the size, but this is purely dependent on browser and is a user initiated action, not a programmable one.</p> <p>And even if you could, remember that <code>localStorage</code> can only store strings so anything else need to be stringified first. That together with this being an key/value storage array you will run into pretty poor performance at the end.</p> <p>If you need large storage capacity, look into File API instead. This is made to work with large files (Blobs) and you can store anything as a Blob.</p> <p>800 Gb is a large size and File API can only work as fast as the file system (at best, more likely a bit slower as it is sandboxed, ie. not a pure file system).</p> <p>More about File System API (<strong>Note: discontinued as of 4/2014</strong>):<br> <a href="http://www.w3.org/TR/file-system-api/" rel="noreferrer">http://www.w3.org/TR/file-system-api/</a></p> <p>Tutorial:<br> <a href="http://www.html5rocks.com/en/tutorials/file/dndfiles/" rel="noreferrer">http://www.html5rocks.com/en/tutorials/file/dndfiles/</a></p> <p>Blob:<br> <a href="https://developer.mozilla.org/en-US/docs/Web/API/Blob" rel="noreferrer">https://developer.mozilla.org/en-US/docs/Web/API/Blob</a></p> <p><strong>Update</strong> As the Filesystem API has been discontinued there are essentially only two options left (besides from storing data to the server):</p> <ul> <li><strong>Indexed Database API</strong> aka <code>Indexed DB</code> (recommended)</li> <li>Web SQL (deprecated but still supported in browsers such as Safari)</li> </ul> <p>Also these are initially limited in size by the browser. It is possible to request a larger quote which the user is asked to accept.</p> <p>See more details about this API here:<br> <a href="http://www.w3.org/TR/IndexedDB/" rel="noreferrer">http://www.w3.org/TR/IndexedDB/</a></p>

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