Just to mention this is a deal breaker for me (also was with copernic, many years ago).

I have been using similar systems since Altavista Desktop Search, and what all of them have in common is that the indexes take a lot of space... On my main computer, if it has to be on the C drive, that is a major problem.

Totally understandable! But there's good news here...

A lot of Appsumos wanted this feature so we listened and prioritized it! It's has been WIP for a couple of days and we plan to release it next week. 🥳

If you check the latest version there's already a button under Settings > Storage > Index Path where it's going to go (the cog icon). 😉

Update: The option to move the index (where most storage is needed) to another drive is included in the latest update.