Storage full update error

I would suggest that you make a current Time Machine backup BEFORE using Recovery Mode. You can then erase your Mac's internal drive, and then, install a clean copy of macOS onto it. From there you can restore your apps & data.

Ref:

• How to reinstall macOS from macOS Recovery - Apple Support

There is no option to “Move to Trash” when I right-click. Alternatively, if I move the file to the Trash icon, nothing will happen and the files will still be in their same place.

I have already uninstalled some apps and currently I’m updating to Catalina, but the corrupted updates may still be there when I’m finished. Is there any way to remove these then?

Thanks in advance.

Your other option would be to perform a "clean" install of macOS Catalina using Recovery Mode to first erase your Mac's system drive, and then, installing the OS. Alternatively, you can create a bootable OS installer on a USB, erase the drive, and then, boot up your Mac with this installer to install Catalina. You would then restore any apps & data from a Time Machine backup which will behoove you to run a current one before attempting to do the clean install.

You may be able to locate the partial upgrade files in the: /Library/Updates folder on your notebook, and then, delete them.

You can delete anything in this folder or just elect to delete the 061-49175 sub-folder. None of the plist files should be more than a few KBs anyway.

I also have this problem, however the folders you mentioned above cannot be deleted. Is there any way to bypass this?

You may need to log into your Mac with a user account with Administrator privileges in order to delete these files.

By logging into your Mac with an account that has them. For example, when you first set up your Mac and you were the only user of the Mac, that initial user account has Administrator privileges.