Sparanoid

Media Auto Hash Rename will rename any file (specific files can be ignored by file extension) during upload, with unique, low collision hashes. Hash characters and length can be configured for even lower collision rate.
More information please visit my <a href="https://sparanoid.com/work/media-auto-hash-rename/" rel="nofollow ugc">site</a>.
This plugin provides no configuration GUI to make it more easier to maintain with the future WordPress updates.
Currently there’re 3 constants you can configure in your <code>wp-config.php</code>, I recommend WP-CLI for maintaining these constants.
<ul>
<li><code>MAHR_LENGTH</code>: length of the random hashes, (default to <code>8</code>), longer can help reduce collision. Hashes at the length of 8 can be collision-free at the scale of 50,000 images).</li>
<li><code>MAHR_CHARS</code>: Characters used in hashes, default to <code>0123456789abcdefghijklmnopqrstuvwxyz_</code>, You can add more characters like uppercased alphabelts to dramatically reduce the collision without increasing the length of your filenames. But please note that this option can be dangerous if you’re not familer with general URI encoding. So if you don’t know what characters are allowed in a filename, just keep it untouched and use the default option.</li>
<li><code>MAHR_IGNORE</code>: File extensions to be ignored, default to <code>pdf, zip</code>, you can define a comma delimited list of file extensions to bypass renaming process of this plugin. All files that has the file extension you defined in the list will be ignored. Please note that:
<ul>
<li>File extensions must be defined without the leading peroid, for example: <code>'pdf, 7z, bmp'</code> works, <code>'.pdf, .7z, .bmp'</code> does not.</li>
<li>With (<code>'pdf, zip'</code>) or without (<code>'pdf,zip'</code>) space both work.</li>
<li>If you define your own ignore list, default ignore list will be discarded. For example, if you define <code>'7z'</code>, then <code>'pdf, zip'</code> will be processed during upload. You need to reapply these extensions with your own: <code>'7z, pdf, zip'</code>.</li>
<li>If you don’t need to ignore any files by its extension. define an empty array <code>[]</code> (without quotes) to this option: <code>define( 'MAR_IGNORE', [] );</code> to force process PDF and ZIP files.</li>
</ul>
</li>
</ul>

Media Auto Hash Rename

Rename media filename during upload with unique hash.

Estmob

The simplest way to Send files Anywhere
Send Anywhere is a cross-platform file sharing service which allows users to easily share digital content peer-to-peer, in real-time, without cloud storage. 
Unlike messenger or cloud based storage apps Send Anywhere allows the end user to send as many files, of any file type and size, as many times as they want, across Android, iOS, and Desktop. SA utilizes p2p networking to bypass cloud storage thereby making the transfer process more secure and quicker. Furthermore, Send Anywhere requires no login or registration – all that is needed is a one time six digit code that will sync the sending and receiving device.
<h4>Features:</h4>
<ul>
<li>Instantly Send Files: Send Anywhere works by creating a temporary six digit which recipients can use to access files sent to them, so long as they download the files within a ten minute time frame.</li>
<li>Receive Securely on Any Device: On the receiving end, all you need to do is enter the six digit code.</li>
</ul>
<h4>Tags</h4>
file transfer, widget, widgets, file, files, transfer, move, upload,uploader, share, download, easy, simple, free, sidebar, multi device, cross platform, sync, real-time

Send Anywhere (File transfer)

Send Anywhere is a cross-platform file sharing service which allows users to easily share digital content peer-to-peer, in real-time, without cloud st …

Media Auto Hash Rename vs Send Anywhere (File transfer)