Delete (all unused) files

Delete (all unused) files

Hi, 

Some of our projects use a large amount of files.
When we replace these files, we are left with hundreds of files that are of no use and make the player slow in the back-end. 

Removing these files one by one is ... hellish work:
  1. find files in Media browser
  2. click - 3 dots,
  3. click - remove element,
  4. move mouse - to pop-up element
  5. click - yes
  6. move mouse - back to Media list
  7. wait 2 seconds for removal to take place
Repeat this 500 times to remove just one old version of the files. 

1) Is there a way to easily delete ALL unused files? 
2) And /or is there an update coming where we can manage files like in "File Explore" where we can put files in folders, batch rename, batch delete, batch replace...?