Question Turning off I/O button everytime after shutdown can do harm?

Oct 6, 2019
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Hello,
So i got those RGB mouse and stuff and they keep being ON when i shutdown my pc. So for them to not be on, i decided to everytime after i shutdown my pc, i press the I/O button at the back of my case to fully stop the supply. Can this somehow damage the supply or the PC? Thanks! Also, could i somehow set it so those turn off too. Ive tried in BIOS but i found nothing, my motherboard is Biostar A320MH