Please do not close this window, it is necessary to get access to the files that you open below. If you close this window, the Genome Browser's IGV track loses access to the files.
Click 'Chose Files' to open files from your local harddisk. For indexed formats both data and index files must be selected.
The Genome Browser webserver does not have access to any files on your harddisk, since it is a website. Data of the files opened below is not sent to UCSC, but it remains on your local computer. As far as we know, it is OK if these files include identifying health information, since the data does not leave your computer. If you make a session shortlink on the Genome Browser, then these files cannot be loaded by the person that opens the session link. As soon as the window is closed, file access is lost and you must re-open the files in this window again.