Is there a maximum number of files and emails that I can index with Copernic Desktop Search?

There are no limits regarding the number of files and emails that you can index in the full version. In fact, there is no limit regarding the index size (except for the Free version which is limited to 25,000 files).

We strongly recommend that you specifically choose what you need to index because the bigger the index is, it may affect the software's performance on your computer.