franzcai

You can upload your image to qiniu cloud storage
some code refer to the following plugin
https://wordpress.org/extend/plugins/dbank-uploader/
Please report bug in https://github.com/caichicong/qiniu-uploader. Thank you.
安装这个插件之后，可以在文章编辑界面点击七牛的图标，上传文件到七牛云储存
部分代码参考了以下插件
https://wordpress.org/extend/plugins/dbank-uploader/
请到 https://github.com/caichicong/qiniu-uploader 反馈bug. 谢谢
<h3>Prerequisite</h3>
Please install curl extension for php (http://php.net/manual/en/curl.installation.php)
<h3>Plugin Usage</h3>
点击富文本编辑器中的七牛图标,在弹出的窗口中点击upload选择要上传的文件,上传完毕后， 
窗口将自动关闭，图片会插入到编辑器相应的位置中。
你可以在 后台管理菜单栏Media (多媒体)下的”七牛云储存”查看已经上传了的文件
<h3>todo</h3>
<ol>
<li>图片删除功能</li>
<li>水印添加功能</li>
</ol>

Qiniu Uploader

You can upload your image to qiniu cloud storage

Mojtaba Darvishi

Poshtiban

WordPress Poshtiban Plugin allows uploading media files to a partition of Poshtiban Cloud Storage(poshtiban.com). So you don’t need to high capacity hosting anymore. Because Poshtiban is cheaper than any file hosting services. 
Wp-Poshtiban gives you the power and ease of use of serving your downloadable products (in Woocommerce) through the Poshtiban infrastructure. 
Also, you can to Backup your files or database backups into the cloud with a single click!
BENEFITS
Using Poshtibn cloud storage to store the wordpress media and downloadable product has the following benefits: 
You can setup your own subdomain on your poshtiban’s partition by using CNAME record (cname.poshtiban.com). 
Poshtiban Cloud storage gives you a 5 Gigabyte partition for free. You can also bay bigger partition up to 1 Terabyte. 
For your downloadable product in woocommerce, you can easily sell your product and pay very littel for storing your files.
FEATURES 
Upload a file or a whole folder in to add media/upload to poshtiban. 
Remote upload option by using direct link. 
Remote upload list for checking upload status. 
In backup menu you can to create backup database or All files (backup for your all wordpress files), themes (backup from themes directory /wp-content/themes/), plugins (backup from plugins directory /wp-content/plugins/) and uploads (backup from uploads directory /wp-content/uploads/)

Poshtiban.com WordPress Plugin

A complete storage solution for WordPress websites.

Qiniu Uploader vs Poshtiban.com WordPress Plugin