What happens is that this process is responsible to scanning both the internal and external storage for media, now unfortunately it’s not the best piece of software.
To fix the issue, depending on your android version you have, go to the apps management section and look for Media Storage. Force Stop it and Clear Data. Reboot.
Now it will re-scan and regenerate the database. (It will have high cpu usage for that period of time (a few minutes depending on how big your storage is)
IF THIS DOESN’T WORK:
It means that one of your media files is corrupted and makes the service retry to rebuild the DB all the time.
What I found that works is an mp3 scan and repair tool for the mac there are some for the PC but that one worked extremely well. (make sure you backup your media before running it)
Please post a comment below if this helped or didn’t help you. Or if you want to say a nice word.
Cheers!
