I’d had a spare 500GB WD Blue NVMe sitting around long enough for SSD caching to become one of those projects I figured I should try. My UGREEN DXP4800 Pro made the most sense for it because that NAS runs Jellyfin and the rest of my media library stack, so it’s doing a lot more than just storing big media files. I installed the SSD, enabled caching in UGOS, and expected the usual NAS upgrade problem, where the benchmark shows something changed but day-to-day use feels exactly the same. That wasn’t what happened. The improvement was obvious almost immediately, but not in the part of the workload I’d originally a**umed would matter.