Hi! Don't worry, your SSD is fine. That 450MB partition is a Recovery Partition. Windows uses it to repair itself if things ever go wrong. Usually, this partition is hidden. A Windows update likely gave it a "Drive Letter" by mistake, which is why it's now showing up and complaining about low space.
I wouldn't recommend to delete it. Now it's very small, and it'll help when your system ever fails to boot.
You can hide it again and stop the warnings. Just need to remove its drive letter so Windows ignores it again.
Right-click the Start button and select Command Prompt (Admin) or Windows Terminal (Admin).
Type diskpart and press Enter.
Type list volume and press Enter. Look for the number of the 450MB volume (let's say it's Volume 3) and its letter, e.g., G: .
Type select volume X (replace X with your volume number).
Type remove letter=Z (replace Z with the letter you want to hide).
