Apple Tape Backup 40SC was released in August 1987, alongside 3 other products.
The Apple Tape Backup 40SC is an external, SCSI-interfaced, 1⁄4-inch (6.35 mm) QIC, mini-cartridge tape drive. It was introduced by Apple Inc. in 1987 and discontinued in 1994. The drive came bundled with Retrospect backup software. The drive is also compatible with the tape software included with A/UX.