Ark is a beast. Taxes the system on many levels. One area is the hard drive.
The first thing I suggest is an SSD drive. The game will load SO much faster. Not 15 minutes loading into the server, but more like 5 or much less depending on your system.
The second issue is most of the SSD’s are still pretty small without breaking the bank. That’s where you need CompactGUI.
It’s based on Windows 10 new compression algorithm, just a friendlier interface. It does a fantastic job of compressing your files. Myself and others have shrunk Ark to half its size and have noticed no performance hit. Highly recommended!