---
sourceDocument: Brazil Build or modify applications
sourceDocumentLink: https://www.servicenow.com/docs/r/application-development

 Release :

    - brazil

ft:locale :

    - en-US

ft:publication_title :

    - Brazil Build or modify applications

ft:clusterId :

    - cadev

bundleId :

    - cadev

workflow :

    - Development, Data, and Analytics


---

# Update sets transfer between sandboxes and base instance

# Update sets transfer between sandboxes and base instance {#ariaid-title1}

Release version: Brazil  
Updated September 10, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
When a sandbox is ready, update set sources are automatically created on both the sandbox and the base instance,
enabling transfers in either direction without manual configuration.

When a sandbox is ready, two update set sources are automatically created to enable transfer of completed update sets in either direction without manual configuration:

* On a sandbox, a source named Base instance points to the base instance.
* On the base instance, a source named Sandbox: \[sandbox name\] points to the sandbox.

{#dsb-update-sets__ul_uss_sources_list}

Use these sources with the standard update set process to retrieve, preview, and commit completed update sets from a sandbox to the base instance. You can also use them to transfer from the base instance to a sandbox. For more
information on update sets, see [System update sets](https://www.servicenow.com/docs/SBbSOZaNjPudRueWTtXqRA "An update set is a group of configuration changes that can be moved from one instance to another. This feature allows administrators to group a series of changes into a named set and then move them as a unit to other systems for testing or deployment.").

When a sandbox is retired, both sources are removed automatically. The base instance source is deleted, and the sandbox source is dropped along with the rest of the sandbox data. No manual cleanup is needed.  
Note:  
Source control is the preferred approach for transferring changes between sandbox and base. Update set sources are available as an alternative for teams that use update-set-based workflows.