DISC

A Stand Disc (スタンドディスク) is a generic-looking compact disc designed after the person from whom it was taken or the Stand that was taken from the person. They are conjured and manipulated by Enrico Pucci's stand Whitesnake, and can even be manipulated as physical objects, such as being stored in a tire and continuing to exist even after Whitesnake no longer exists. The discs are indestructible unless inserted into a dying person, causing the inserted disc to slowly crumble.

Function
There are two types of discs: Memory Discs and Stand Discs (the term used here refers to the disc containing the Stand of its original user).
 * Stand Disc: This disc contains the Stand of a person in question. A person with his or her Stand disc taken from them will collapse into a near-death state. Stand discs can be inserted into compatible users, even enabling some such as Emporio to temporarily bypass the one-Stand rule. Pucci can also enable people to follow commands by inserting discs with information or impossible situations.


 * Memory Disc (記憶ディスク): This disc contains the memories of the person in question. Even if only the Memory Disc of the person is removed, the person in question will still be kept alive albeit in a vegetative state, unable to even perform basic functions. Strangely, however, Jotaro was shown to have kept himself in a meditation position even when he only had his Stand Disc reinserted, implying that subliminal or learned behaviors garnered over the years are not removed if the Memory Disc itself is removed. A Memory Disc can also be read by other people who do not own the original Memory Disc via insertion of the disc into their heads.

Notable Discs

 * Jotaro Kujo's Memory Disc: that disc was critical for Enrico Pucci's plans, as it contained the exhaustive memories of Jotaro Kujo, most notably his memories from DIO's Diary, containing the informations necessary to "attain Heaven".
 * Weather Report's Memory Disc: Pucci kept that disc close to him, since he extracted the memory of his brother Wes Bluemarine to seal off Heavy Weather.
 * Weather Report (Stand)'s Stand Disc: when he died, Weather Report used Pucci to extract his own Stand as a last gift to his companions. It proved critical in Pucci's demise, when Emporio had the priest insert it into him and used Weather Report to kill Pucci.
 * Foo Fighters's Stand Disc: Pucci tossed that disc into the sea, where a colony of plankton used it to gain sentience and be used as a guardian for Pucci's reserve of Stand Discs. The colony of plankton dubbed Foo Fighters would become a core ally of Jolyne Cujoh.
 * Thunder McQueen's Memory Disc: extracted from the inmate when he was defeated, Jolyne and Hermes examined the memories inside, seeing Whitesnake's hidden stash of Stand Discs.
 * Sports Maxx's Memory Disc: extracted from the inmate when he was killed, Jolyne and Foo Fighters examined the memories inside, and discovered the existence of DIO's Bone, which led Jolyne to let herself be put into the maximum security ward to investigate the Bone.

Trivia

 * The Stand Disc's functioning is very similar to Heaven's Door's abilities.
 * The Stand Discs appears in Jojo's Bizarre Adventure: All-Star Battle as part of Pucci's HHA. During this special move, Whitesnake steals a disc from the opponent (much like he did to Jotaro), then the enemy can't use an special ability until he makes a combo on Pucci and recovers the disc. The characters who don't have stands will not be able to use their Stands equivalents to the "stand button" such as Jonathan's Hamon and Johnny's Horseback.