hdd shows up as RAM cached drive detected on userbanchmark

Oct 31, 2018
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Hi,
I built this pc just a few days ago, ran a userbenchmark to test its performance, and get this for my 2tb hdd.
RAM cached drive detected
What is this exactly, and do I need to do something to fix this?
Here are my userbenchmark results.
UserBenchmarks: Game 46%, Desk 90%, Work 77%
CPU: AMD Ryzen 5 2600X - 97.6%
GPU: Nvidia GTX 1050-Ti - 40%
SSD: Samsung 860 Evo 250GB - 120.4%
HDD: Seagate ST2000DM005-2CW102 2TB - 102%
USB: SRT USB 64GB - 29.2%
RAM: Corsair Vengeance LPX DDR4 3000 C16 2x8GB - 80.6%
MBD: MSI B450M PRO-VDH (MS-7A38)
Thanks!