You can extract all data including custom fields from a list by doing the following:

1. Click on the 'Subscribers' tab located in the left-hand side menu. Locate the subscriber list you wish to export.

2. Click the options menu ("...") located on the bottom right corner of the Subscriber Action tile for your chosen subscriber list and select the 'Export' link. This will bring up the subscriber export window with a pre-populated target expression.

3. By default, 'List Subscription' will be selected. Alternatively, you can choose 'Subscriber Profile'. Refer to the 'Exporting your Subscribers' section of the V5 documentation for extract type definitions and 'What type of extracts can I generate'.

4. Click the blue 'Generate extract' button.

The subscriber export window will close and your extract will start generating. All notifications related to your export will be displayed in the notifications tray located at the top-right of the window.

Once your extract has been generated it can be downloaded via a link located in the notification tray.

You can download a sample of the data extract first to review the output before downloading the full ZIP file.