Users of both WD-branded and SanDisk-branded SSDs should be able to use the SanDisk Dashboard software to check for firmware updates and perform other kinds of drive maintenance
I had the misfortune of having to use that last month as it was the only way to disable the LED on a SN850X. It lagged horribly on switching between tabs, and I will try to avoid any product that requires it in future.
The only saving grace is that the LED remained disabled even after uninstalling it.