> 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/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="/files/PL9vs6QdykRkDxEZlIaP" 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.