MP3 player spoils the drive when switched off?

I had estt a bunch of MP3 players ,ranging from the brand - SanDisk,Samsung,Transendent to the real game but without the kind of tribe, and even the model number.Now chase the Chinese Ruizu.No one player ruined the memory card . flasheo you can ditch when you extract exchange data with a computer.But if she just connected that nothing terrible will happen.The player similarly,when you disable it the system is closed and cuts off power to the card.That is, nothing bad will happen.
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