My iMac running macOS High Sierra has two SSD drives: 256GB with the OS on it and 2TB for data.
Spotlight returns zero results when doing a search on both drives. Also other apps using Spotlight for searching (for example the Calendar app and Outlook 2016) return no results when doing a search.
However, searching an external connected USB drive works perfectly, and also searching a shared remote network drive gives perfect search results!
I did a re-index, but that didn’t solve my problem.
Looking in Finder, I see the root .Spotlight-V100
folder with a red “forbidden” sign. Is this normal?