> For the complete documentation index, see [llms.txt](https://docs.stacksync.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stacksync.com/two-way-sync/connectors/hubspot/attachments.md).

# Attachments

### How HubSpot Attachments Work

Attachments are always associated with an Engagement object, such as a call, note, or similar interaction. They can be linked to both Standard and Custom objects in HubSpot.

<figure><img src="https://2867423571-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FfJjIdV9cuW6K8asJjTPJ%2Fuploads%2FPh9PkzQl9XdvI3tJEq4S%2FScreen%20Shot%202024-10-14%20at%203.52.48%20PM.png?alt=media&amp;token=dc4ea49f-0264-43f0-9b7e-78d6bd2e9b52" alt=""><figcaption></figcaption></figure>

Syncing Attachments in Stacksync:

* At least one Engagement object needs to be synced along with the Attachments object. For example, to sync all attachments linked specifically to Calls, you must sync both *Calls* and *Attachments*.
* To sync all attachments regardless of the engagement object they are associated with, you need to sync *all objects*. However, syncing all objects is not recommended unless it is necessary, as this can result in syncing unnecessary data.