Yes, the USB memory card readers lock switch can prevent any unnecessary writes to the SD memory cards.
The LED indicator on USB memory card readers does not monitor the read and write activities but the Lock switch.
The write protect switch on SD memory cards prevent your information from being written over.
The write protection switch on the secure digital memory card helps prevent the accidental erasure of the data in the memory card.
it won't switch on.
ALL SD and SDHC cards are supplied with an integral switch to prevent accidental erasure of the data stored on it.
Look on the side of the memory stickYou will find a little switch called LockPush the switch to the lock positionNow your Memory Stick is write protected
Yes, the compact flash memory cards provide a write protect switch.
Adjust the switch on the memory card adapter
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If your memory card is showing that it is write-protected, it means that the switch on the memory card is in the locked position. You need to move the switch to the unlocked position to allow writing to the memory card. Simply slide the switch on the memory card to the opposite side to disable the write protection.
Memory cards typically contain a small switch. One of the switches states will lock the memory card, preventing data from being written, erased, or changed on it. The other state will allow you to freely edit the contents of the memory card. Unlocking the memory card is usually just a matter of flicking the switch on it.
Switch from an HDD to an SSD.