What does the enable/disable ME subsystem option in Supermicro X9DRi-F motherboard BIOS do?

It’s well known fact that the Intel Management Engine can not be completely disabled. Its functionality can be greatly reduced using me_cleaner which utilizes various techniques including switching the ME “kill switch”. However, the Supermicro X9DRi-F BIOS contains ENABLE/DISABLE option for ME subsystem: Motherboard manual says the following: ME Subsystem Select Enabled to support Intel…

External disk drive write performance decreases after some time. What could be the reason?

I have an external USB 3 “spinning rust” 2.5” Harddisk. Serial number lookup at Western Digital reveals this is a model WDBYNN0010BBL, “WD My Passport (Ultra) Portable Storage, Blue”. 1 TB = 931.48 GB, cheap and cheerful. No data sheet. WD instrumentation software provides no way to find out more about the actual harddisk in…