help my SSD is filling up for no reason

yeah its not adding up

My name is Ru. I'm an Independent Advisor and I'll be glad to help you today.

Can you go to Settings > System > Select "Storage" from the left navigation.

Now you will be able to see how your storage is divided by category.

Please follow the following article to free up some space.

https://support.microsoft.com/en-us/windows/fre...

Friendly advice, you have to be willing to listen to people (even if you're angry) to resolve issues.  This is what you need to do - in order:

1. Follow below to perform disk cleanup - except you will select all the check boxes when it prompts you.  Then you will select "System Files" and select all of the check boxes there as well.  Then run the disk cleanup by clicking "OK".
2. Run a full anti-virus scan with built-in Windows Defender.  Delete any PUPs or quarantined files.
3. Go to This PC -> C:\ and look for a folder called Windows.old.  If you don't have one, then great.. you are done for now.  If you do see it, then right click and delete it permanently.

If it fills right back up after doing these steps then re-post to this thread and I/we can give you some more advanced troubleshooting guidance.

Free up space with Disk Cleanup

If your system doesn't have Storage sense, you can use the Disk Cleanup tool to delete temporary files and system files from your device.

1. In the search box on the taskbar, type disk cleanup, then select itfrom the results.
2. Select the check box next to the type of files you want to delete. (To view a description of each type of file, select the name.) By default, Downloaded Program Files, Temporary Internet Files, and Thumbnails are selected. Be sure to clear those check boxes if you don't want to delete those files.
3. To free up even more space, select Clean up system files, and then select the type of system files you want to delete. Disk Cleanup will take a few moments to calculate the amount of space that can be freed up. Note: If it’s been fewer than 10 days since you upgraded to Windows 10, your previous version of Windows will be listed as a system file you can delete. If you need to free up drive space, you can delete it, but keep in mind that you'll be deleting your Windows.old folder, which contains files that give you the option to go back to your previous version of Windows. If you delete your previous version of Windows, this can't be undone. (You won't be able to go back to your previous version of Windows.)
4. After you’ve selected the types of files you want to delete, select OK, and then select Delete files in the confirmation window to start the cleanup.

Important: 

• There's also an option in Disk Cleanup to Compress your OS drive. Selecting this option compresses the drive on which Windows is installed, helping you gain extra space to install important updates. This action does not delete the contents of this drive, and you shouldn't experience problems opening and saving files from the compressed drive.
• After you install the update, you can manually decompress the OS drive at any time. To do this, select File Explorer  from the taskbar, and in the left pane, select This PC. Right-click or tap and hold the OS drive (usually disk C), and then select Properties on the shortcut menu. Clear the Compress this drive to save disk space check box, and then select Apply > OK.

Check Disk management to see if you have a large hard drive that you should  be using to install everything and save all your files. Right click on the start button to get to disk management.  Windows uses the C drive by default. Change the save location to D drive if you have a hard drive.

Have you run the disk cleanup already? When you do that click on "Clean up system files" and that will give you more options to check.

Please note that this will not clear the storage under "Apps and features".