When PC Access starts, it checks to see how much free space you have on the hard disk where you installed PC Access. If you have less than 10 MB space remaining, PC Access displays this message to warn you of impending danger. As you use PC Access and other applications, your hard disk tends to fill up gradually with data files. If your disk becomes full, you will start getting errors from applications that try to write new data to your disk. To avoid this problem, you should periodically delete old files that you no longer need. (You can use the Purge Files window to delete old PC Access data files.)
If you are short on disk space and you need to keep all your existing files, you might consider buying a larger hard disk. Be aware that if you upgrade to a larger hard disk, you must first uninstall PC Access.