Windows 10: Why does apps & features say its taking up 17GB of storage when my actual installed apps is...

I've downloaded treesize to see if I can figure out what's going on but I'm not a computer person so I don't know what I'm looking for and if there's anything I can delete. I tried including a picture but not sure if its uploaded. Please can you help, thank you.

:)

 

How to see actual apps that are taking up storage?

I only have 70 gb left in storage for my local disk and when I checked system > storage it says that 282 gb of storage is taken up by my installed apps but when I click on the apps and sort it by largest to smallest, the biggest ones that take up storage are Premiere Pro and Photoshop which only take 3 gb each. The rest of the apps I have installed don't even pass 1 gb and I highly doubt that they all combine to equal 282 gb. So I am just wondering how can I actually see what is taking up all the storage or is this really the entire extensive list?

 

Why does Apps and Features say it’s taking up more storage than the sum of the apps?

I’m trying to make room on my computer and noticed that Apps and Features in storage settings says it takes up 134GB. I went through all the apps to try and figure out how the heck that happened and noticed that:

1) there are a bunch of apps that don’t list a storage size beside them (this includes things from Epson, Dropbox, Norton Security, Spotify, Steam, etc). I also uninstalled Spotify to see how much it would make a difference and nothing changed, even after
a restart.

2) if I add up everything manually, including my best estimates for these files without the storage size listed, I come at most to 50GB. Are there other apps in this section that aren’t shown or why would this be happening?

 

Why does apps and features say it's taking up more storage than all my apps combined?

In my settings in the storage section it says apps & features takes up 11.7 GB of my storage even though the apps I have installed only add up to a little less then 600 MB. Why does it say this and how can I free up this storage?