Have you had a trim recently?
Remember the old days when you enjoyed watching your hard disk defrag? If you don't, see the attached video. If you have an SSD (solid state disk), then you should be aware that you should not defrag it. It should, however, be trimmed. TRIM is automatically enabled in Windows 10 if it detects that you are using an SSD. To see this in operation, do the following:
Open the Windows 10 Start Menu and type "optimize" into the search box. Select "Defragment and Optimize Drives" app from the search results. The Optimize Drives window shows connected drives that can be optimized. Select the SSD from the list and then press the "Optimize" button to manually start trim.
https://www.youtube.com/watch?v=uVYdSuFFmCU