Question: What other format was the Greatest Hits released on besides the analog sound storage medium known as LP?

Context paragraphs:
Recording format: A recording format is a format for encoding data for storage on a storage medium.  The format can be container information such as sectors on a disk, or user/audience information (content) such as analog stereo audio.  Multiple levels of encoding may be achieved in one format.  For example, a text encoded page may contain HTML and XML encoding, combined in a plain text file format, using either EBCDIC or ASCII character encoding, on a UDF digitally formatted disk.

LaserDisc: LaserDisc (abbreviated as LD) is a home video format and the first commercial optical disc storage medium, initially licensed, sold and marketed as MCA DiscoVision in North America in 1978.  Although the format was capable of offering higher-quality video and audio than its consumer rivals, VHS and Betamax videotape, LaserDisc never managed to gain widespread use in North America, largely due to high costs for the players and video titles themselves and the inability to record TV programs.  It was not a popular format in Europe and Australia when first released but eventually did gain traction in these regions to become popular in the 1990s.  By contrast, the format was much more popular in Japan and in the more affluent regions of Southeast Asia, such as Hong Kong, Singapore and Malaysia, and was the prevalent rental video medium in Hong Kong during the 1990s.  Its superior video and audio quality made it a popular choice among videophiles and film enthusiasts during its lifespan.  The technologies and concepts behind LaserDisc were the foundation for later optical disc formats including Compact Disc (CD), DVD and Blu-ray (BD).

Sega Card: The Sega Card, known in Japan as Sega My Card, is a memory card format used as game storage for the SG-1000/SC-3000 and the Mark III/Master System.  Produced from 1985 to 1987 by Mitsubishi Plastics, the cards are plugged into onboard cardslots or into compatible adapters.  Several versions of the format were created, including a rewritable one that allows new titles to be downloaded to a card.  While substantially cheaper to produce than cartridges, the storage limitations of the format resulted in Sega exclusively distributing games on cartridges.  Despite the failure of the Sega Card, NEC found more success with its own memory card format, the HuCard, which was primary storage medium for its PC Engine game console.

History of the floppy disk: A floppy disk is a disk storage medium composed of a disk of thin and flexible magnetic storage medium encased in a rectangular plastic carrier.  It is read and written using a floppy disk drive (FDD).  Floppy disks were an almost universal data format from the late 1970s into the 1990s, used at first as a primary data storage mechanism, and later mostly as a file transfer system as part of what became known as "sneakernet".

Acetate disc: An acetate disc, is a type of phonograph (gramophone) record, a mechanical sound storage medium, widely used from the 1930s to the late 1950s for recording and broadcast purposes and still in limited use today.

LP record: The LP (from "long playing" or "long play") is an analog sound storage medium, a vinyl record format characterized by a speed of 33 ⁄ rpm, a 12 or 10 inch (30 or 25 cm) diameter, and use of the "microgroove" groove specification.  Introduced by Columbia in 1948, it was soon adopted as a new standard by the entire record industry.  Apart from a few relatively minor refinements and the important later addition of stereophonic sound, it has remained the standard format for vinyl albums.

Audio mastering: Mastering, a form of audio post production, is the process of preparing and transferring recorded audio from a source containing the final mix to a data storage medium (the master); the source from which all copies will be produced (via methods such as pressing, duplication or replication).  In recent years digital masters have become usual although analog masters, such as audio tapes, are still being used by the manufacturing industry, notably by a few engineers who have chosen to specialize in analog mastering.

Video Floppy: A Video Floppy is an analog recording storage medium in the form of a 2-inch magnetic floppy disk used to store still frames of composite analog video.  A video floppy, also known as a VF disk, could store up to 25 frames either in the NTSC or PAL video standards, with each frame containing 2 fields of interlaced video.  The video floppy also could store 50 frames of video, with each frame of video only containing one field of video information, recorded or played back in a "skip-field" fashion.

Gramophone record: A gramophone record (phonograph record in the US), commonly known as a vinyl record or simply vinyl or record, is an analog sound storage medium in the form of a flat polyvinyl chloride (previously shellac) disc with an inscribed, modulated spiral groove.  The groove usually starts near the periphery and ends near the center of the disc.

Greatest Hits (Depeche Mode album): Greatest Hits is a greatest hits album by English electronic music band Depeche Mode, released in 1987 by Amiga.  It was released exclusively in East Germany on LP and cassette.

Supporting paragraphs: Greatest Hits (Depeche Mode album) LP record
Answer: cassette