xpkdisk3
XPK disk v37.5 by Olaf 'Rhialto' Seibert. This is an exec-style device that looks like trackdisk.device and similar disks. The difference is that it compresses its data and stores it in multiple files in an existing filesystem. It uses the XPK (eXternal PacKer) standard to do the actual compression. This has many advantages.