1. 保管箱：
Dropbox 是美国公司 Dropbox Incorporation 提供的文件托管服务。它提供云存储、文件同步、个人云和客户端软件。它成立于 2007 年。 Dropbox 是由两位麻省理工学院的学生 Drew Houston 和 Arash Ferdowsi 开发的。它仅提供 2 GB 的免费存储空间。它是最早的云存储服务之一。
2.百度云：
百度云是百度公司提供的云服务。它提供云存储服务、客户端软件、文件管理、资源共享和第三方集成。一旦在客户端上创建文件，它就可以在基于 Internet 的客户端上自动同步文件。它由百度公司于2012年推出。它的实际名称是百度网盘，但俗称百度云。
Dropbox 和百度云的区别：
| DROPBOX | BAIDU CLOUD |
|---|---|
| It is owned by Dropbox Incorporation. | It is owned by Baidu Incorporation. |
| It was launched in 2007. | It was launched in 2012. |
| It was developed by Drew Houston and Arash Ferdowsi. | It was developed by Baidu Incorporation. |
| It offers 2 GB free storage space. | It offers 6 GB free storage space. |
| It supports less types of file formats. | It supports more types of file formats. |
| It shares files through web applications. | While it shares files through links. |
| It is used world wide. | While it is used in some specific region and specific countries like China. |
| It uses block-syncing to update changes quickly. | It does not use block-syncing to update changes quickly. |
| It has unlimited maximum storage size. | It has the maximum storage size of 2 TB. |
| Maximum file size in Dropbox is 10 GB. | Here maximum file size is 4 GB for free and 20 GB for paid. |
| It supports file versioning. | It does not supports file versioning. |
| It does not support remote uploading. | It supports remote uploading. |