1. OneDrive：
OneDrive 或 Microsoft OneDrive 是 Microsoft 提供的文件托管和同步服务。它为用户存储文件、个人数据和共享文件提供了便利。它提供 5 GB 的免费存储空间。它由微软于 2007 年推出，主要供专业工作者使用，用于存储可能需要更高安全性的工作相关数据。
2.亚马逊S3：
Amazon S3 代表 Amazon Simple Storage Service。它是由 Amazon Web Services 提供的云存储服务。它通过 Web 服务接口提供对象存储。它允许存储任何类型的对象，例如用于分析、数据归档、备份和恢复、灾难恢复、混合云存储和互联网应用程序的数据湖。它由 AWS 于 2006 年推出。
OneDrive 和 Amazon S3 的区别：
| ONEDRIVE | AMAZON S3 |
|---|---|
| It is owned by Microsoft Incorporation. | It is owned by Amazon. |
| It was launched in 2007. | It was launched in 2006. |
| It offers 5 GB free storage space. | It does not offer free storage space. |
| It was developed by Microsoft. | It was developed by Amazon Web Services (AWS). |
| OneDrive is mostly used by professionals. | It is used for both professional and personal works. |
| It provides full security of data. | It also provides full security of data but comparatively less. |
| It has the maximum storage size of 5 TB. | It has the unlimited maximum storage size for paid users. |
| It supports remote uploading. | It does not support remote uploading. |
| Maximum file size in OneDrive is 100 GB. | Here maximum file size is 5 GB. |
| It supports file versioning for office files only. | It fully supports file versioning. |
| It does not require credit-card for free services. | It requires credit-card details for free trial. |