The TRS-80 Mini Disk is a small version of a floppy disk. The disks are 5.25-inch in size ('small' in comparison to the 8-inch disks that were commonly used on larger systems at the time). The number 0 disk can contain about 58,8000 bytes of file space, and each additional disk will contain 83,060 bytes of file space.

To use the TRS080 Mini Disk, you need a 16K Level II BASIC TRS-80 microcomputer or a 16K Level I BASIC TRS-80 microcomputer which has been modified to Level II BASIC. You will also need the TRS-80 Expansion Interface that is distributed under three different part numbers (the difference in the three part numbered units is the amount of additional RAM they provide).

The 26-1160B Disk Drive is supplied with a ribbon interconnect cable and is fitted with a set of termination resistors. Therefore in a multi-drive system, the 1160B unit should be furthest from the computer end of the cable. Additional Disk Drives should be of the 1161B type, which are not fitted with the termination resistors.