I found 225 mb of data stored in the my files app trash bin. They are dated December 23rd the day I installed the December 1st security update. There's an option to restore them but all my folders and files are intact so I emptied the trash. It will probably delete them in 30 days but if you're low on storage space you might want to take a look.
Solved! Go to Solution.
Galaxy S21 SM-G991U on Xfinity Mobile + Gear S2 Classic
Yes, I wasn't sure if this was strictly associated with the T-mobile update or a common occurrence with the December security update. I don't remember seeing it leave them behind with previous updates. I guess Strange things happen once in a while. Thank you for letting me know I appreciate it.