In Blocks Edit, next to your organization at the top, click the integrations icon (). Note: You’ll see the integration option only if you are an admin or owner on the account.
Click the Add button next to FTP/sFTP.
Add your FTP access info in the modal that comes up.
Give your integration a name you can refer to.
Set the home directory and a base URL that matches it. This will be used when exporting images, automatically updating image URLs in your email's HTML.
Choose your connection type based on whether you have an FTP or an sFTP setup and provide the credentials that are asked for.
Template access settings
You will need to enable your integration for each template that you want to allow using as a source for images in the editor. You can do this in the dashboard by clicking on the preferences icon () on the right side of a template title.
When enabled, the option to set a base directory to access images from is available. For example, if you want to limit access to a certain project folder.
Note: you will need to be an admin or owner on the account to have access to these settings.