Path to the cached file without downloading

**Is your feature request related to a problem? Please describe.**

Would it be possible to get the path of the (cached) file or the base directory of a collection?

**Describe the solution you'd like**

An easy access (without downloading) to the path information

**Describe alternatives you've considered**

None

**Additional context**

This is to integrate with datamestro (in particular to get description of datasets without triggering a download)