That's the super-duper high speed internal memory and that looks normal. If you start getting 4GB left on your system drive, that could be very serious.Does this tell you anything useful with Audacity?
Desktop > Go > Computer. Control-Click on the system drive (attached 1) > Get INFO.
You're looking for Capacity and Available numbers (attached 2).
This is my "office machine." I wouldn't dream of doing heavy audio (or video) production with available numbers that low.
Now that you closed Chrome, Are your problems still there?
Koz