You have 20 external drives. You know a great shot of a sunset exists from 2019, but you don't know which drive it is on. An advanced catalog lets you search by Camera=Sony A7III , Lens=24-70mm , Date=2019 and instantly tells you: Drive E: /Projects/Summer/Output/Raw/Sunset_001.ARW .
You have 50TB of Linux ISOs, ebooks, and old software. You need to ensure no drive fails without a backup. The catalog checks your checksums weekly. When a drive dies, you use the catalog to generate a list of exactly what was lost. advanced disk catalog
The fatal flaw of OS search engines is that they require the disk to be online. If you have a backup drive from 2021 sitting in a fire safe, your OS has amnesia about its contents. You cannot search for "taxes_2021.pdf" on a drive that isn't plugged in. You have 20 external drives
An is a database . It is a snapshot of reality. You have 50TB of Linux ISOs, ebooks, and old software
