To accompany the fast M.2 NVMe (for OS and programs), maybe you check for reliable and less noisey / less hot 5.400 rpm WD Red NAS instead of WD Black with 7.200 rpm.
Aside M.2 NVMe, I use a 8 TB (partitioned) WD80EFZX internally and for backup WD20EFRX / WD40EFRX externally (ICY BOX IB-366Stu3+B). – To circumvent the external USB3-connection, when copying really big archives, the machine is equipped with ICY BOX IB-170SK-B to directly insert a 3.5" HD (exchange when system down!).
also check here PL4 computer specs compared to PL3? - #38 by Wolfgang
have fun, Wolfgang