A 3.5" disk drive from Sharpsoft (01-739 8559) should give your MZ700's memory a jolt. At £287 the MFD 700 has an inbuilt disk controller which means you don't need any further boxes. With 180K of memory, the Disk Basic that comes with the drive is compatible with Sharp S Basic and leaves 31K of user RAM. With the disk drive hooked up to your MZ700 you will be able to use an extra 21 commands - a nice touch on a programmer's system.