In March 2017, a 4chan user (always a 4chan user) posted a thread titled “lost charli folder – real?” The image was a screenshot of a Finder window. The folder name: . Inside: 11 .wav files, each with a _spike_mix suffix.
The is a highly sought-after unofficial collection of tracks from Charli XCX's shelved third studio album. These "Real Spike Mixes" refer to the studio-quality reference mixes created by legendary producer and mixer Spike Stent during the original recording sessions between 2015 and 2017 . Essential Tracklist Info
A typical "Real Spike Mixes" zip file found in fan communities usually includes: XCX World: Discography | Charli XCX Wiki