Could not find it on this forum yet, so just FYI as it also may afflict Windows 10.
I came across this article while reading about maintenance on Windows 8.x.
why-windows-8-defragments-your-ssd-and-how-you-can-avoid-thisWhy Windows 8 and 8.1 defragment your SSD and how you can avoid this!
Youíve probably heard that modern OS Windows donít defragment solid state drives. Yet there is a (bug) limitation in Windows 8+ that causes the OS to run this unnecessary for SSDs operation from time to time. Letís take a closer look at how it happens.
It's an article with some codes to run in PowerShell to show you excactly what Windows 8.x is running under the hood, and wow how was I wrongly informed that Windows 8.x BY DEFAULT did not - in any way - touch your SSDs with defragging command.
Have a read, Cheers...