I have a Samsung 870 EVO 1Tb which I've had for 4 months without any notable problems. Few days ago whenever booting a game from that drive it takes absurdly long which even put HDDs to shame. Other drives work normally and when moved same games between drives. Yesterday, after a while, it just started to work normally, reaching 100s of MB/s read and write, but while the problem is occurring it barely reaches 1-2 MB/s and keeps at 100% usage.