Western Digital NAS WD40EFRX 4TB SATA 6GB/S WD Red NAS Only 2,573 Hours Manufacturers Date 10/19/20

Expected Operating Lifespan Typically 3 to 5 years of continuous 24/7 use (approximately 26,000 to 43,000 power-on hours). Many users report these drives running well past 50,000.