Mb z370 sli+, i5 8600k, 16gb ddr4 3000mhz. First m2 slot Intel MX 3.0x4 660p 512gb, main drive. Second Crucial m2 MX 500 500gb, for storage. Even when empty the MX 500 shows activity. If I format it I am told a process is running. Have checked for virus, and malware. There are none. Previously when was inactive it was just that...inactive. My suspicion is that the 660p may be using that to booster it's cache, which was reported to slow the drive down when full. Though I have never had any problems. Any ideas why the Crucial shows activity when empty when previously it did not.