Storage Transfer Service pricing

This page describes pricing for Storage Transfer Service.

Pricing overview

Service	Price* (USD)
Agentless transfers	No charges
Agent-based transfers to or from file systems	$0.0125 / 1 gibibyte
Agent-based transfers from S3-compatible storage	No charges
Agent-based transfers from HDFS	No charges
Transfers from S3 over managed private network within Canada	$0.03 / 1 gibibyte
Transfers from S3 over managed private network within North America	$0.03 / 1 gibibyte
Transfers from S3 over managed private network within EU	$0.04 / 1 gibibyte
Transfers from S3 over managed private network within APAC	$0.08 / 1 gibibyte

* You will be charged this fee in addition to charges associated with network usage and operations performed by the service at source and destinations on your behalf.

The following sections provide detailed information about the pricing for different transfer scenarios.

Storage Transfer Service pricing details

You are charged for data stored on Cloud Storage as documented in Cloud Storage pricing.

External cloud providers' costs may apply while you use Storage Transfer Service.

Common charges

The following charges may apply when you use Storage Transfer Service, regardless of the source:

You incur charges from Cloud Storage usage during the course of a transfer, such as:
Transferring from one Cloud Storage bucket to another.
Rewriting data in a Cloud Storage bucket.
Deleting data from a Cloud Storage bucket. For more information, see early deletion fees.
A transfer may require listing the contents of both the source and destination buckets. You incur charges from both Cloud Storage and the source cloud provider when Storage Transfer Service performs a list operation. A single list operation can retrieve a maximum of 1000 objects per bucket. For more, see Cloud Storage Operations pricing and the appropriate pricing page of the source cloud provider.

External providers to Cloud Storage transfer pricing

The following charges may apply when you use Storage Transfer Service to transfer data from an external provider to Cloud Storage, in addition to the charges specified in Common charges:

You incur a PUT operation charge for each object added to a Cloud Storage bucket. For more information, see Cloud Storage operations pricing.
You may incur outbound data transfer and operational charges from your source cloud provider. For more information, see the appropriate pricing page of the source cloud provider.

Note: Storage Transfer Service provides optimization to avoid copying data if the source data and destination data match, reducing your outbound data transfer charges. You can change this by setting overwriteObjectsAlreadyExistingInSink to True. For information on changing this default, see TransferOptions.

Cloud Storage to Cloud Storage transfer pricing

The following charges apply when you use Storage Transfer Service to transfer data between Cloud Storage buckets, in addition to the charges specified in Common charges:

You incur transfer charges when transferring data from a Cloud Storage bucket to another Cloud Storage bucket. For more information, see Network pricing.
Storage Transfer Service uses Cloud Storage rewrite operations to move data between Cloud Storage buckets, a Class A operation, as well as a GetObjectMetadata request per object transferred, a Class B operation. For more information, see Cloud Storage pricing.

File system transfer pricing details

The following table summarizes the billable charges for data transferred to, from, or between file systems:

Service	Price (USD)
Storage Transfer Service agent-assisted transfers	$0.0125 / 1 gibibyte

Storage Transfer Service generates charges only for bytes transferred to the destination successfully. If Storage Transfer Service retries an object transfer that failed, the initial bytes moved on the failed request are not billed. Similarly, if you start an incremental transfer, you are not billed for files that haven't changed from the previous transfer, because Storage Transfer Service doesn't re-transfer the file.

Do the following to view the cost of a single transfer:

Go to the Transfer jobs page in the API Console.
Click the job in question. The Job details page is displayed.
In the Data transferred field, note the total bytes transferred.
Calculate the cost of your transfer: Total bytes * $0.0125 per GB.

Note: Cloud Storage pricing and non-transfer charges are applied when you use Transfer for on-premises.

Non-transfer charges

While transferring data, Storage Transfer Service uses Google Cloud resources. Using those resources generates billable operations on your behalf for Cloud Storage. An operation is an action that makes changes to or retrieves information about buckets and objects in Cloud Storage. For more information, see Cloud Storage operations pricing.

The following table summarizes the billable operations that occur during a Storage Transfer Service transfer operation:

Operation type	How the operation is generated
Cloud Storage Class A operations	When writing objects during a transfer, the number of operations depends on the size of the file. Small to medium files incur one operation per file. Larger files can incur more than one operation per file due to use of multipart upload to achieve faster transfers. When listing objects during a transfer, the number of operations depends on the source directory structure and the number of objects already in the destination bucket. Additional operations may be required for certain transfer configurations, such as delete-unique-at-sink or manifest-based uploads. These are billed to the Cloud Storage project for your destination Cloud Storage bucket.
Cloud Storage Class B operations	For manifest-based uploads, 1 operation is incurred per file in the manifest. These are billed to the Cloud Storage project for your destination Cloud Storage bucket.

Operation type

How the operation is generated

Cloud Storage Class A operations

When writing objects during a transfer, the number of operations depends on the size of the file. Small to medium files incur one operation per file. Larger files can incur more than one operation per file due to use of multipart upload to achieve faster transfers. When listing objects during a transfer, the number of operations depends on the source directory structure and the number of objects already in the destination bucket. Additional operations may be required for certain transfer configurations, such as delete-unique-at-sink or manifest-based uploads. These are billed to the Cloud Storage project for your destination Cloud Storage bucket.

Cloud Storage Class B operations

For manifest-based uploads, 1 operation is incurred per file in the manifest. These are billed to the Cloud Storage project for your destination Cloud Storage bucket.

Files that are restarted mid-upload due to a modification on your premises will not incur an extra cost from Storage Transfer Service. They may incur an extra Cloud Storage cost, as the files with changes may be treated as additional files within Cloud Storage. However, we expect that this scenario is rare enough that it doesn't meaningfully influence cost.

Note: The scenario above describes approximate resource consumption, which may vary based on your environment. It also refers to current pricing for Cloud Storage, and may change after this writing. For cost-concious users, we recommend that you perform a small transfer job with a sample of your data before beginning your production transfer jobs. This will enable you to gauge your non-transfer costs in your environment.

For more information about Google Cloud resource pricing, see:

Cloud Storage operations pricing

What's next

Read the Storage Transfer Service documentation.
Learn about Storage Transfer Service solutions and use cases.

Request a custom quote

With Google Cloud's pay-as-you-go pricing, you only pay for the services you use. Connect with our sales team to get a custom quote for your organization.