Question [Q] S3 using 20GB of System Memory! What is going on?

I have a 32GB S3 with only 5.73GB of available space. Looking in my storage settings the reason is System Memory is gigantic at 19.95GB.

How can system memory take up so much space? I mean most S3 phones are only 16GB total.

Something is obviously amiss but not sure how to get to the bottom of this. Any help or suggestions would be appreciated.

TIA