1.亚马逊云端硬盘：
Amazon Drive是Amazon提供的文件托管服务和云存储。它允许云存储，文件托管，文件共享和文件备份。可以从台式机，移动设备和平板电脑等多种设备上传输此驱动器上的文件和文件夹。 Amazon Drive最初被称为Amazon Cloud Drive。它在世界范围内不可用。它在某些选定的国家/地区可用。它于2011年推出。
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。它是一个对象存储服务。它由Backblaze Incorporation在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了无限的存储空间。它也被称为B2云存储。
Amazon Drive和Backblaze B2之间的区别：
| AMAZON DRIVE | BACKBLAZE B2 |
|---|---|
| It is owned by Amazon. | It is owned by Backblaze Incorporation. |
| It was launched in 2011. | 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 used in all countries excluding Mexico and China. | While it is used world wide. |
| It has the maximum storage size of 30 TB. | Maximum storage size is unlimited here. |
| Maximum file size in Amazon Drive is 2 GB via Web and 50 GB via Drive application. | Here is no such restrictions. |
| It does not support file versioning. | It 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 is used mainly for storing photos. | It is used for storing all types of files including photos, videos, pdf etc. |