When running → First Aid on an external drive or internal volume in macOS, the operation may fail with:
According to Apple’s official documentation, error –69845 is categorized as a “software file system inconsistency.” However, Reddit’s two million macOS users have observed that it can be a – especially on 2016-2018 MacBook Pros with known SSD controller issues. file system verify or repair failed. --69845- reddit
…your disk may have or irreparable container corruption . At this point, the Reddit hive mind shifts from “repair” to “rescue.” When running → First Aid on an external
This article combines official Apple documentation with the to help you understand what this error means, why it’s happening, and—most importantly—how to fix it without losing your data. why it’s happening