How to Fix Write Protection on a SanDisk Memory Card

Updated April 17, 2017

The SanDisk memory card is one of the most versatile portable mass storage devices available. The card can be used in many digital devices, such as cameras, digital camcorders and cell phones. The SanDisk stores everything from data to photos to music and can be used to transfer files from one device to another with ease. To protect your files, the SanDisk includes a built-in a lock, or write protection, that prohibits a user from erasing or deleting information on the disk unless it is unlocked.

Locate the switch on the left side of the SanDisk memory card. Slide the switch down to the lock position. Write protection is now on.

Reset the lock if the Write Protection notice does not appear when you insert the SanDisk into a card reader on your computer. To reset, slide the switch on the left-hand side of the SanDisk up and down three times and wait 30 seconds with the lock in the "on," or down position.

Insert the SanDisk card in the card reader on your computer. If you can transfer files but not delete the files from the card, Write Protection is working.


If you have Write Protection off but cannot delete items from a SanDisk memory card while it is inserted into your computer, it may be a problem with the permissions in your computer's operating system, and not the SanDisk card. If you are using another type of memory card similar to the SanDisk, the information may be corrupt and the card may need to be formatted to restore its capabilities.


Keep the SanDisk Write Protection lock on when transferring files using a program that includes an option to "delete after copying" until you are sure all your files have been transferred properly.

Things You'll Need

  • Computer with card reader included or attached
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About the Author

Suzanne Smith Dickinson has been a professional writer since 1989. She currently maintains a humorous blog that has garnered national attention. Her articles have appeared in "Community Health Forum" magazine, and many of the Suburban newspapers and special sections in Michigan, Georgia and North Carolina. She attended Georgia State University as an Honors English student.