> For the complete documentation index, see [llms.txt](https://karansingh.gitbook.io/aws-saa-c02/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://karansingh.gitbook.io/aws-saa-c02/storage-gateway-and-fsx-and-snowball-snowmobile/storage-gateway-overview.md).

# Storage Gateway Overview

* **Connects an on-premises software appliance with cloud-based storage** to provide seamless integration with data security features between your on-premises IT environment and the AWS storage infrastructure.

## File Gateway

* Enables you to **store and retrieve objects in Amazon S3** using file protocols such as **Network File System (NFS) and Server Message Block (SMB)**.<br>
* **Objects written through File Gateway can be directly accessed in S3**.

## Volume Gateway

* Provides **block storage to your on-premises applications using iSCSI connectivity**.<br>
* **Data on the volumes is stored in Amazon S3** and you can **take point in time copies of volumes which are stored in AWS as Amazon EBS snapshots**.<br>
* **Cached volumes**
  * Store your data in Amazon S3 and retain a **copy of frequently accessed data subsets locally**.
  * Retain **low-latency access to your frequently accessed data**.<br>
* **Stored volumes**
  * If you need low-latency access to your **entire dataset**, first configure your on-premises gateway to store all your data locally.

## Tape Gateway

* Provides your backup application with an iSCSI virtual tape library (VTL) interface, consisting of a virtual media changer, virtual tape drives, and virtual tapes. Virtual tapes are stored in Amazon S3 and can be archived to Amazon S3 Glacier or Amazon S3 Glacier Deep Archive.<br>
* Provides **cloud-backed virtual tape storage**.<br>
* With a tape gateway, you can **cost-effectively and durably archive backup data in GLACIER or DEEP\_ARCHIVE**.
  * A tape gateway provides a virtual tape infrastructure that scales seamlessly with your business needs and eliminates the operational burden of provisioning, scaling, and maintaining a physical tape infrastructure.