Drive Configurations:
| Drive 1 | Drive 2 | Drive 3 | Count (internal included) |
| Apple 3.5" | Apple 3.5" | UniDisk 3.5" | (4-3.5") |
| Apple 3.5" | UniDisk 3.5" | UniDisk 3.5" | (4-3.5") |
| UniDisk 3.5" | UniDisk 3.5" | UniDisk 3.5" | (4-3.5") |
| Apple 3.5" | Apple 3.5" | Apple 5.25" | (3-3.5" 1-5.25") |
| Apple 3.5" | UniDisk 3.5" | Apple 5.25" | (3-3.5" 1-5.25") |
| UniDisk 3.5" | UniDisk 3.5" | Apple 5.25" | (3-3.5" 1-5.25") |
| Apple 3.5" | Apple 5.25" | Apple 5.25" | (2-3.5" 2-5.25") |
| UniDisk 3.5" | Apple 5.25" | Apple 5.25" | (2-3.5" 2-5.25") |
| Apple 3.5" | Apple 3.5" | none | (3-3.5") |
| Apple 3.5" | UniDisk 3.5" | none | (3-3.5") |
| UniDisk 3.5" | UniDisk 3.5" | none | (3-3.5") |
| Apple 3.5" | Apple 5.25" | none | (2-3.5" 1-5.25") |
| UniDisk 3.5" | Apple 5.25" | none | (2-3.5" 1-5.25") |
| Apple 5.25" | Apple 5.25" | none | (1-3.5" 2-5.25") |
| Apple 3.5" | none | none | (2-3.5") |
| UniDisk 3.5" | none | none | (2-3.5") |
| Apple 5.25" | none | none | (1-3.5" 1-5.25") |
Slot and Drive Configurations
| Internal 3.5" | slot 5 drive 1 (PR#5 boots this drive) |
| First external 3.5" | slot 5 drive 2 * |
| Second external 3.5" | slot 2 drive 1 |
| Third external 3.5" | slot 2 drive 2 |
| First external 5.25" | slot 6 drive 1 (PR#6 boots this drive) |
| Second external 5.25" | slot 6 drive 2 |
| * The first external 3.5" boots at power on or reset if no disk is inserted in the internal drive. This disk does not boot when a PR#5 is entered. |
Notes:
- The Apple 3.5" is an 800K platinum drive.
- The UniDisk 3.5" is an 800K white drive.
- The Apple 5.25" is a 140K platinum drive (formerly called UniDisk in the beige color).