The "index" of Adobe Lightroom typically refers to its , which acts as a database tracking your photos, their locations, and every edit you make. Because Lightroom is "non-destructive," it doesn't change your original files; it simply "indexes" them to remember how you want them to look. Adobe Help Center
This version of the "Index" represents the tension between software as a service (SaaS) and the desire for ownership. For years, this search query was the battleground between Adobe’s shift to the subscription model and a user base accustomed to one-time purchases. The "Index" here was a shadow library, a black market distribution network. It spoke to a deep frustration among creatives: the feeling that the tools of the trade were being held hostage by a monthly fee. index of adobe lightroom