# Accessing Sequence Data via NCI's Cancer Data Service (CDS)

NOTE: dbGaP approval for HTAN study phs002371 is required in order to access HTAN lower-level genomics data, such as RNAseq FASTQ and BAM files.

The CDS Portal, within NCI's Cancer Research Data Commons (CRDC), provides an interface to filter and select data from a variety of NCI programs, including controlled-access, primary sequence data from the Human Tumor Atlas Network (HTAN).

In order to access these HTAN data within the CDS Portal, navigate to the portal in a web browser and click on the Explore CDS Data button on the landing page.

On the Data Explorer page, expand the STUDY section on the left sidebar, scroll down, and check the box next to Human Tumor Atlas (HTAN) primary sequence data.

This action will change the summary panel to reflect selecting HTAN data only.

Scroll down, or click on the Collapse View tab on the upper right just below the query summary line in order to see the tabulated view of all of the participants, samples or files in HTAN.

Click on the Add All Files button, or select the check boxes next to all Participants, Samples or Files for a subselection and then click on the Add Selected button. This action will update your cart icon in the upper right corner.

Clicking on the cart icon, will bring up a list of the selected files. Click on the Download Manifest button in the upper right to download a CSV-formated (Excel compatible) file of this file list.

Once this file manifest is downloaded, it will have to be uploaded into your Seven Bridges Cancer Genomics Cloud account, in order for you to be able to download, or otherwise compute on, these data.