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. Backblaze B2 :
Backblaze B2 是由 Backblaze Incorporation 提供的云存储服务。它与 Amazon S3 和其他云存储服务非常相似。它是一种对象存储服务。它由 Backblaze Incorporation 于 2015 年推出。它提供 10 GB 的免费存储空间。它还为高级帐户提供无限的存储空间。它也被称为 B2 云存储。
OneDrive 和 Backblaze B2 之间的区别：
| ONEDRIVE | BACKBLAZE B2 |
|---|---|
| It is owned by Microsoft Incorporation. | It is owned by Backblaze Incorporation. |
| It was launched in 2007. | It was launched in 2015. |
| It offers 5 GB free storage space. | It offers 10 GB free storage space. |
| It provides limited storage space for paid. | It provides unlimited storage space for paid. |
| It is mostly used by professionals. | It is used for professional as well as personal storage. |
| It has the maximum storage size of 5 TB. | Maximum storage size is unlimited here. |
| Files are encrypted at servers. | Files are not locally encrypted. |
| It supports file versioning for office files only. | It fully supports file versioning. |
| It charges comparatively more for additional storage that means it is more costly. | It charges less for additional storage that means it is less costly. |
| It provides full security of data. | It provides more security of data than Onedrive. |