Why does Fortnite stutter during fast building on Kioxia EXCERIA PRO?

I felt totally disconnected during fast-paced resource battles; entering complex buildings caused 150ms micro-stutters that made time feel stretched. I tried disabling write caching in Windows Disk Management, but that was a mistake—it actually increased total loading time by 4 seconds. I finally used GamePP NVMe Queue Depth Configuration to increase the depth from 1024 to 2048. RTSS confirmed frame generation time converged to 8-12ms, while AIDA64 showed stable temperatures at 42-56℃ and GamePP Benchmark recorded read latency at 5-12ms.