The Q10 comes with "Media Centre". This does not scrape files. and it does allow you to look through folders and then click on video or music files to play them. But there is no Search option so It would not be suitable for you.
If you want to search, you would need to install a file manager app. Most Android file managers can be installed on the Q10. I use "File Commander" but you could also try "Fx", "Total Commander", etc.. "File Commander" allows you to search for any file anywhere on the Q10 and then click on that file (if it's a video or music file) to play it. But you won't get the same range of controls that you have on Kodi!
Kodi will only scrape files which are within its Library. When you first set up Kodi YOU will say which folders on the HDD you want to be part of Kodi's Library.
Basically, these are defined as: Music (e.g. files stored in a folder named "music", and its sub-folders, on the HDD) and Video (e.g. files stored in a folder named "video", and its sub-folders, on the HDD).
But you can create any other folders you want: "holiday_videos"; "trip_to_usa"; etc. and then add them to the Kodi Library .... or not if you don't want to!
You need to read through the Kodi Wiki:
https://kodi.wiki/view/HOW-TO:Create_Video_Library
https://kodi.wiki/view/Naming_video_files/Movies
But there is another little trick you can do in Kodi. You can create a simple empty file (using something like Notepad) and save it with the name ".nomedia" and copy this file in any folder, or sub-folder, on your HDD and Kodi will not scan or scrape any of the files in that folder or sub-folder to the Library!