Grab your favorite translator and head on over to OCInside and read their review of the Crucial MX500 1TB M.2 SSD. I've Google translated this quote to get you started:
A few weeks ago we had the Crucial MX500 1TB SSD viewed in 2.5-inch format and today we test now on OCinside.de the Crucial MX500 1TB SSD as M.2 version. We're testing the differences between the MX500 2.5-inch vs. M.2 SSD and testing the M.2 both with and without a passive M.2 heatsink on the ASRock Z390 Extreme4 motherboard.