It's possible your SD card is bad and turned out to 'read-only mode'.
If possible, test it under Windows machine with SD card reader, use DISKPART in command line ( How to use DiskPart to clean and format drive not working on Windows 10 | Windows Central ), reformat it with single NTFS partition and copy some files there. Then eject the SD card safely and put it again to test if it's working (the new files are still there) or not.
You may also use an USB key to install and run LE on RPi 4B instead of SD card.
Ok as I stated in my original post I DO NOT HAVE WINDOWS ON ANYTHING HERE!
I am sorry you wasted our time hopefully the Windows suggestion will help someone in the future.
Now I wait """"""You have already written a post within the last 2,400 seconds. You must wait at least 2,101 seconds before attempting to write a new post."""""""
Yup libreelec.tv does not want problems solved in a reasonable time frame.