1.糖同步：
SugarSync 是 J2 Global 提供的云服务和文件同步服务。它可以主动同步计算机系统和其他设备中的文件，以进行备份、访问和共享。它受 Windows、macOS、iOS 和 Android 操作系统支持。它由 J2 Global 于 2009 年推出。它不提供免费存储空间。它为付费用户提供有限和无限的存储空间。
2.Yandex 磁盘：
Yandex Disk 是 Yandex 提供的云存储、文件同步和文件共享服务。它允许用户将文件存储在云上，并允许与他人在线共享文件。它由 Yandex 于 2012 年推出。它提供 10 GB 的免费存储空间。它为付费提供了有限的最大存储空间。 Yandex Disk 提供的最大存储空间为 1024 GB。
SugarSync 和 Yandex 磁盘的区别：
| SUGARSYNC | YANDEX DISK |
|---|---|
| It is owned by J2 Global. | It is owned by Yandex. |
| It was launched in 2009. | It was launched in 2012. |
| It was developed by J2 Global. | It was developed by Yandex. |
| It does not offer free storage space. | It offers 10 GB free storage space. |
| It provides limited as well as unlimited maximum storage space for paid. | It provides limited maximum storage space for paid. |
| Developer API is REST. | Developer API is REST, WebDAV and SDK. |
| It has the maximum storage size of 60 GB for personal paid and unlimited for professional paid. | Maximum storage size is 1024 GB. |
| It has traffic or band-width limit of 10 GB per day for free and 250 GB per day for paid. | It has traffic or band-width limit of 200% of storage size per day. |
| Maximum file size is not restricted here. | Here maximum file size is 2 GB upload via Web and 50 GB upload via application. |
| It does not provide additional free storage space for referral. | It provides additional 10 GB free storage space for referral. |
| It supports file versioning. | It does not support file versioning. |