MY SSD 120 gb

Can anyone please tell me whats wrong with my ssd its very slow
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CrystalDiskMark 7.0.0 x64 (C) 2007-2019 hiyohiyo
Crystal Dew World: https://crystalmark.info/

  • MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
  • KB = 1000 bytes, KiB = 1024 bytes

[Read]
Sequential 1MiB (Q= 8, T= 1): 488.840 MB/s [ 466.2 IOPS] < 17117.69 us>
Sequential 1MiB (Q= 1, T= 1): 447.112 MB/s [ 426.4 IOPS] < 2343.42 us>
Random 4KiB (Q= 32, T=16): 9.396 MB/s [ 2293.9 IOPS] <205928.10 us>
Random 4KiB (Q= 1, T= 1): 4.559 MB/s [ 1113.0 IOPS] < 896.55 us>

[Write]
Sequential 1MiB (Q= 8, T= 1): 231.937 MB/s [ 221.2 IOPS] < 35872.98 us>
Sequential 1MiB (Q= 1, T= 1): 231.325 MB/s [ 220.6 IOPS] < 4527.61 us>
Random 4KiB (Q= 32, T=16): 23.959 MB/s [ 5849.4 IOPS] < 78809.69 us>
Random 4KiB (Q= 1, T= 1): 16.548 MB/s [ 4040.0 IOPS] < 247.03 us>

Profile: Default
Test: 1 GiB (x5) [Interval: 5 sec] <DefaultAffinity=DISABLED>
Date: 2020/02/20 3:41:33
OS: Windows 10 Professional [10.0 Build 18362] (x64)

Yes it is wd ssd green m.2 120 gb

The first week performance was good however recently it has been very slow

My os installed on this wd ssd 120 gb