Is 29gb of system use excessive?

I used the power button, volume and home key and cleared the cache, but I'm obviously doing something wrong, coz this is what it looks like now.
Check in the DCIM folder for photos/videos and move to online or PC. Connect your phone to a computer and move it by cut and paste (preferably backup to Google Photos too through the Photos app).
 
Thankyou. I will transfer my media to laptop which will free some space. I will try the method for clearing the history too. Thankyou, I was thinking I would have to go to the store.
 
How does it work though that approx 12gb is images, video and app, but where is all the gb?? I know the system will use some of that but not half surely?
 
It clearly says like 3.Xgb is used by Android system, that's the storage space you can't clear. It's the operating system itself.
You have a LOT of media (photos & videos), you could benefit greatly by using Google photos and getting them off the device itself. Then you're using a ton of space with installed apps.
There's nothing WRONG here, you've just used all your storage space.
Using Google photos or simply moving all your photos and videos to a computer will clear like gb.
 
So I've been moving my photos to my laptop and deleting them. I also found a load of what's app media when I connected the phone to the laptop -but I couldn't find this through the phone itself. I've cleaned out loads of pics and now its telling me photos are taking up more than before- please help Me, what am I doing wrong???
 

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So I've been moving my photos to my laptop and deleting them. I also found a load of what's app media when I connected the phone to the laptop -but I couldn't find this through the phone itself. I've cleaned out loads of pics and now its telling me photos are taking up more than before- please help Me, what am I doing wrong???
Turn off synching. Sign out of everything. You really need to go to the store and have them help you.